119 Sentences With "semilunar" | Random Sentence Generator

They are sometimes referred to as the semilunar ganglia or the solar ganglia.

Ames: Iowa University Press. conjunctivitis with persistent lacrimation, and semilunar fold swelling in chickens, ostriches, and humans, respectively.

The ostium for the maxillary sinus opens posteriorly in this groove and is the largest ostium within the semilunar hiatus.

Transverse line indistinct. Light yellowish reniform stigma is semilunar with large black spot at the bottom half. Orbicular stigma yellowish. In male genitalia, uncus short and hooked.

The pulsatile nature of blood flow creates a pulse wave that is propagated down the arterial tree, and at bifurcations reflected waves rebound to return to semilunar valves and the origin of the aorta. These return waves create the dicrotic notch displayed in the aortic pressure curve during the cardiac cycle as these reflected waves push on the aortic semilunar valve. With age, the aorta stiffens such that the pulse wave is propagated faster and reflected waves return to the heart faster before the semilunar valve closes, which raises the blood pressure. The stiffness of the aorta is associated with a number of diseases and pathologies, and noninvasive measures of the pulse wave velocity are an independent indicator of hypertension.

The aortic and pulmonary valves are located at the base of the aorta and the pulmonary trunk respectively. These are also called the "semilunar valves". These two arteries receive blood from the ventricles and their semilunar valves permit blood to be forced into the arteries, and prevent backflow from the arteries into the ventricles. These valves do not have chordae tendineae, and are more similar to the valves in veins than they are to the atrioventricular valves.

Humans also have vestigial structures, including the ear muscles, the wisdom teeth, the appendix, the tail bone, body hair (including goose bumps), and the semilunar fold in the corner of the eye.

Where the groove ceases laterally the patellar surface is seen to be continued backward as a semilunar area close to the anterior part of the intercondyloid fossa; this semilunar area articulates with the medial vertical facet of the patella in forced flexion of the knee-joint. The tibial surfaces of the condyles are convex from side to side and from before backward. Each presents a double curve, its posterior segment being an arc of a circle, its anterior, part of a cycloid.

From the right ventricle, blood is pumped through the semilunar pulmonary valve into the left and right main pulmonary arteries (one for each lung), which branch into smaller pulmonary arteries that spread throughout the lungs.

The folium vermis is a short, narrow, concealed band at the posterior extremity of the vermis, consisting apparently of a single folium, but in reality marked on its upper and under surfaces by secondary fissures. Laterally, it expands in either hemisphere into a considerable lobule, the superior semilunar lobule (lobulus semilunaris superior; postero-superior lobules), which occupies the posterior third of the upper surface of the hemisphere, and is bounded below by the horizontal sulcus. The superior semilunar lobules and the folium vermis form the lobus semilunaris.

The outer lip is finely plicate within. The basal lip is thickened and plicate. The short columella terminates in an acute tooth. The middle of the columellar area contains a longitudinal semilunar groove, frequently irregularly curved.

Auscultogram from normal and abnormal heart sounds Systolic heart murmurs are heart murmurs heard during systole, i.e. they begin and end between S1 and S2. Many involve stenosis of the semilunar valves or regurgitation of the atrioventricular valves.

Dolichopterid eurypterids had outer surfaces that were either smooth or with pustules and semilunar scales. The compound eyes were arcuate and located anteriorly on the prosoma (head). The abdomens had epimers (lateral projections). The telson, (tail) was lanceolate.

Bathytoma viabrunnea (specimen in MNHN, Paris) The solid shell has a fusiform shape. It has a smooth, brown, two-and- a-half-whorled vitreous nucleus. The body whorl has semilunar riblets. And the teleoconch contains eight slightly turreted whorls.

The tuber of vermis, the most posterior division of the inferior vermis, is of small size, and laterally spreads out into the large inferior semilunar lobules, which comprise at least two-thirds of the inferior surface of the hemisphere.

It is the pressure created from ventricular contraction that closes the valve, not the papillary muscles themselves. The contraction of the ventricle begins just prior to AV valves closing and prior to the semilunar valves opening. The sudden tensing of the chordae tendineae and the squeezing of the ventricles against closed semilunar valves, sends blood rushing back toward the atria, and the parachute-like valves catch the rush of blood in their leaflets causing the valve to snap shut. The S1 sound results from reverberation within the blood associated with the sudden block of flow reversal by the valves.

Traces of analogous sculpture can be observed with a lens also on the base. The aperture is semilunar. The outer lip is thin, sharp, with a shallow anal sulcus adjacent to the suture. The body with the sculpture erased, is white and polished.

Auscultogram from normal and abnormal heart sounds Diastolic heart murmurs are heart murmurs heard during diastole, i.e. they start at or after S2 and end before or at S1. Many involve stenosis of the atrioventricular valves or regurgitation of the semilunar valves.

Approximately 70–80 percent of ventricular filling occurs by this method. The two semilunar valves, the pulmonary and aortic valves, are closed, preventing backflow of blood into the right and left ventricles from the pulmonary trunk on the right and the aorta on the left.

Dolichopteridae, which lived in the Silurian and Devonian periods, had outer surfaces that were either smooth with pustules and semilunar scales. Their compound eyes were arcuate and located anteriorly on the prosoma (head). Their abdomens had epimers (lateral projections). The telson, (tail) was lanceolate.

The opening if of pulmonary artery (or pulmonary trunk) is circular, and situated at the summit of the conus arteriosus, close to the ventricular septum. It is placed above and to the left of the atrioventricular opening, and is guarded by the pulmonary semilunar valves.

It is white and iridescent within. The arched columella is callous, concave. It has a deep semilunar longitudinal groove and is slightly produced at its base. The operculum is rounded oval, flat and dark chestnut inside, with four or five whorls and a subcentral nucleus.

The shell of species in this genus is more or less transparent, subdepressed and contains an umbilicus. The aperture is semilunar and usually lacks teeth. The outer lip is thin and sharp. The animal is elongate and is able to retract completely within its shell.

Transverse striae, pretty fine and numerous, are observed between each of the rows of the spines. The white aperture is semilunar. The outer lip is thick and furnished internally with fine striae. The columella is nearly straight, covered by the inner lip which forms a callosity.

In fact the smooth muscle within the abdominal aorta is derived from mesoderm, and the coronary arteries, which arise just above the semilunar valves, possess smooth muscle of mesodermal origin. A failure of the aorticopulmonary septum to divide the great vessels results in persistent truncus arteriosus.

A quadricuspid aortic valve (QAV) is a rare congenital heart defect characterized by the presence of four cusps, instead of the usual three found normally in the aortic valve.Hurwitz, L. E., & Roberts, W. C. (1973). Quadricuspid semilunar valve. The American Journal of Cardiology, 31(5), 623–626.

The trigeminal ganglion (or Gasserian ganglion, or semilunar ganglion, or Gasser's ganglion) is a sensory ganglion of the trigeminal nerve (CN V) that occupies a cavity (Meckel's cave) in the dura mater, covering the trigeminal impression near the apex of the petrous part of the temporal bone.

A shallow deep secondary crater is surmounted by a flat semilunar wide surface. Small southbound andesitic lava flows are associated with the main crater. Some deep gorges cut into the volcano, and erosion has removed of rock. Moraines, mainly occurring on the eastern side of the volcano, descend to .

William Hey William Hey (23 August 1736 – 23 March 1819) was an English surgeon, born in Pudsey, West Yorkshire, the son of Richard Hey and his wife Mary Simpson; John Hey and Richard Hey were his brothers. He was a surgeon at Leeds General Infirmary from its opening in a temporary building in 1776, and senior surgeon from 1773 to 1812. He gave his name to Hey's amputation (a tarso-metatarsal amputation), Hey's internal derangement (dislocation of the semilunar cartilages of the knee joint), Hey's ligament (the semilunar lateral margin (falciform margin) of the fossa ovalis), and Hey's saw, used in skull surgery. Hey served as mayor of Leeds in 1787–88 and 1802–03.

Indication of three semilunar pockets along a shallow groove between the dentary and the prearticular shows that the lower jaw has three coronoids. It is unique in that it has a very large adductor fossa, a convex ventral flange, and a prearticular of minute denticles dorsally and undulating parallel ridges ventrally.

Upper extremity of left ulna. Lateral aspect. Near the elbow, the ulna has two curved processes, the olecranon and the coronoid process; and two concave, articular cavities, the semilunar and radial notches. The olecranon is a large, thick, curved eminence, situated at the upper and back part of the ulna.

The outer margin of the forewing is smooth and the labial palp is extended forwards. Males are identified by the semilunar notch. Females live for an average of 12 days; males live for an average of 21 days. Silk trails left by larvae in a bumblebee nest in a bird box.

In the piriform cortex, layer I consists mostly of afferent inputs to apical dendrites of deeper cells. Layer I is subdivided into layers Ia and Ib each having its own afferents. Layer II is densely packed with pyramidal and semilunar cells. Layer III contains mostly pyramidal cells in its superficial part.

The superior tarsus (tarsus superior; superior tarsal plate), the larger, is of a semilunar form, about in breadth at the center, and gradually narrowing toward its extremities. It is adjoined by the superior tarsal muscle. To the anterior surface of this plate the aponeurosis of the levator palpebræ superioris is attached.

Front of thorax, showing surface relations of bones, lungs (purple), pleura (blue), and heart (red outline). Heart valves are labeled with "B", "T", "A", and "P". First heart sound: caused by atrioventricular valves - Bicuspid/Mitral (B) and Tricuspid (T). Second heart sound caused by semilunar valves -- Aortic (A) and Pulmonary/Pulmonic (P).

Aranzi discovered the 'Nodules of Aranzio' in the semilunar valves of the heart and wrote the first description of the superior levator palpebral and the coracobrachialis muscles. His books (in Latin) covered surgical techniques for many conditions, including hydrocephalus, nasal polyp, goitre and tumours to phimosis, ascites, haemorrhoids, anal abscess and fistulae.

The subfamily Bipaliinae is characterized by having a semilunar head that gives them the common name "hammerhead worms". The head has peripheral sensory pits on the ventral side and small peripheral eyes on the dorsal side.Winsor, L.; Johns, P. M.; Barker, G. M. (2004). Terrestrial planarians (Platyhelminthes: Turbellaria: Tricladida: Continenticola) predaceous on terrestrial gastropods.

The paranasal sinuses are connected to the nasal cavity through small orifices called ostia. Most of these ostia communicate with the nose through the lateral nasal wall, via a semi-lunar depression in it known as the semilunar hiatus. The hiatus is bound laterally by a projection known as the uncinate process. This region is called the ostiomeatal complex.

The semilunar valves (the pulmonary and aortic valves) are formed from four thickenings at the cardiac end of the truncus arteriosus. These thickenings are called endocardial cushions. The truncus arteriosus is originally a single outflow tract from the embryonic heart that will later split to become the ascending aorta and pulmonary trunk. Before it has split, four thickenings occur.

Front of thorax, showing surface relations of bones, lungs (purple), pleura (blue), and heart (red outline). The locations of best auscultation for each heart valve are labeled with "M", "T", "A", and "P". First heart sound: caused by atrioventricular valves – Mitral (M) and Tricuspid (T). Second heart sound caused by semilunar valves – Aortic (A) and Pulmonary/Pulmonic (P).

When this occurs, blood flows from the atria into the ventricles, pushing open the tricuspid and mitral valves. As pressure drops within the ventricles, blood flows from the major veins into the relaxed atria and from there into the ventricles. Both chambers are in diastole, the atrioventricular valves are open, and the semilunar valves remain closed. The cardiac cycle is complete.

Pumiri is a volcano in the Andes that rises above the surrounding terrain. The volcano is located in the Oruro Department, Sabaya Province, northwest of the Salar de Coipasa. The volcano is formed from two volcanic cones. The younger of which may be of Holocene age and is constructed in the middle of a caldera marked by a semilunar shape.

The Chandravalli cave temple (also known as the Ankali Mutt - Saints from Ankalagi (Belgaum) came here for meditation) is semilunar in shape located between two giant monolithic rocks, a pre-historic site is about three km from Chitradurga. There is a lake which is adds the importance to cave temple. The forest around the lake is a good place for bird watching.

The lunate bone (semilunar bone) is a carpal bone in the human hand. It is distinguished by its deep concavity and crescentic outline. It is situated in the center of the proximal row carpal bones, which lie between the ulna and radius and the hand. The lunate carpal bone is situated between the lateral scaphoid bone and medial triquetral bone.

The last whorl is globose, not carinated, divided by a submedian blackish band above, the upper part having only a few spots near the periphery, the base with numerous brown spots arranged concentrically. The shell aperture is semilunar and a little oblique. The columellar (parietal) margin is arcuate, convex, and three-toothed. The median tooth is the most strongly developed.

As the heart chambers contract, so do the papillary muscles. This creates tension on the chordae tendineae, helping to hold the cusps of the atrioventricular valves in place and preventing them from being blown back into the atria. Two additional semilunar valves sit at the exit of each of the ventricles. The pulmonary valve is located at the base of the pulmonary artery.

The aortic orifice, (aortic opening) is a circular opening, in front and to the right of the left atrioventricular orifice, from which it is separated by the anterior cusp of the bicuspid valve. It is guarded by the aortic semilunar valve. The portion of the ventricle immediately below the aortic orifice is termed the aortic vestibule, and has fibrous instead of muscular walls.

Phonerpeton is represented only by relatively small specimens compared to the much larger Acheloma. Dilkes (1990) diagnosed Phonerpeton by the semilunar curvature of the squamosal, doming of the parietals along the midline, a closed basicranial joint with a clear suture between the pterygoid and the basipterygoid process of the parasphenoid (the basicranial joint), an unossified sphenethmoid, long and slender mid-dorsal ribs, a radius with a semicircular cross section, and a ridge along the anterolateral edge of the ulna. He differentiated it from Acheloma by the large and posteriorly open otic notch, a posterodorsal process of the quadrate consisting of two sheets of bone separated by a poorly ossified region, a semilunar curvature of the squamosal, and an unfused basicranial joint. Schoch & Milner (2014) retained only the absence of a slit- like notch (which is found in Acheloma) in the diagnosis.

The semilunar hiatus or hiatus semilunaris, is a crescent-shaped groove in the lateral wall of the nasal cavity just inferior to the ethmoid bulla. It is the location of the openings for maxillary sinus. It is bounded inferiorly and anteriorly by the sharp concave margin of the uncinate process of the ethmoid bone, superiorly by the ethmoid bulla, and posteriorly by the middle nasal concha.

The conus arteriosus has a variable number of semilunar valves. The ventral aorta delivers blood to the gills where it is oxygenated and flows, through the dorsal aorta, into the rest of the body. (In tetrapods, the ventral aorta is divided in two; one half forms the ascending aorta, while the other forms the pulmonary artery). The circulatory systems of all vertebrates are closed.

Cardiac neural crest develops into melanocytes, cartilage, connective tissue and neurons of some pharyngeal arches. Also, this domain gives rise to regions of the heart such as the musculo-connective tissue of the large arteries, and part of the septum, which divides the pulmonary circulation from the aorta. The semilunar valves of the heart are associated with neural crest cells according to new research.

The larger semilunar medial meniscus is attached more firmly than the loosely fixed, more circular lateral meniscus. The anterior and posterior horns of both menisci are secured to the tibial plateaus. Anteriorly, the transverse ligament connects the 2 menisci; posteriorly, the meniscofemoral ligament helps stabilize the posterior horn of the lateral meniscus to the femoral condyle. The coronary ligaments connect the peripheral meniscal rim loosely to the tibia.

The medial meniscus is a fibrocartilage semicircular band that spans the knee joint medially, located between the medial condyle of the femur and the medial condyle of the tibia.Platzer (2004), p 208 It is also referred to as the internal semilunar fibrocartilage. The medial meniscus has more of a crescent shape while the lateral meniscus is more circular. The anterior aspects of both menisci are connected by the transverse ligament.

Its base is continuous with the body of the bone, and of considerable strength. Its apex is pointed, slightly curved upward, and in flexion of the forearm is received into the coronoid fossa of the humerus. Its upper surface is smooth, concave, and forms the lower part of the semilunar notch. Its antero-inferior surface is concave, and marked by a rough impression for the insertion of the brachialis.

Traube's (semilunar) space is an anatomic space of some clinical importance. It is a crescent-shaped space, encompassed by the lower edge of the left lung, the anterior border of the spleen, the left costal margin and the inferior margin of the left lobe of the liver. Thus, its surface markings are respectively the left sixth rib superiorly, the left mid axillary line laterally, and the left costal margin inferiorly.

There are anterior, posterior, and two lateral thickenings. A septum begins to form between what will later become the ascending aorta and pulmonary tract. As the septum forms, the two lateral thickenings are split, so that the ascending aorta and pulmonary trunk have three thickenings each (an anterior or posterior, and half of each of the lateral thickenings). The thickenings are the origins of the three cusps of the semilunar valves.

The upper articular area can be divided into the inner and outer lateral sides. The lateral side has a triangular-shaped border and is slightly concave; it is limited in a top view by the fossa for the upper articulation of the radius. The inner side forms a semilunar-shaped fossa that caps the lunar-shaped condyle of the humerus. The radius is long and slightly S-curved.

The second heart sound, S2, is the sound of the semilunar valves closing during ventricular diastole and is described as "dub". Each sound consists of two components, reflecting the slight difference in time as the two valves close. S2 may split into two distinct sounds, either as a result of inspiration or different valvular or cardiac problems. Additional heart sounds may also be present and these give rise to gallop rhythms.

Once the lymph flows into the next lymphangion, it cannot return to the previous lymphangion, as the semilunar valves close tightly. In conditions when the pressure in a lymphatic is sufficiently great, the valves may fail, and there can indeed be backward flow of lymph resulting in edema of the drained region. This may happen with blockage of lymph flow because of pathology in the draining lymph node or at some point in the vessel.

The lateral meniscus (external semilunar fibrocartilage) is a fibrocartilaginous band that spans the lateral side of the interior of the knee joint. It is one of two menisci of the knee, the other being the medial meniscus. It is nearly circular and covers a larger portion of the articular surface than the medial. It can occasionally be injured or torn by twisting the knee or applying direct force, as seen in contact sports.

Supplementary information In C. oculatus, the eyes were semilunar in shape (almost moon-shaped) and placed near the middle of the carapace, with small ocelli (light-sensitive simple eyes) between them. Its carapace had small irregular prominences, a rounded anterior edge and an indented posterior edge. The thoracic segments (segments of the thorax) of the species were straight and narrow. The eyes of C. salmi were similar, being placed very close together.

Aortopulmonary septal defect is a rare congenital heart disorder accounting for only 0.1-0.3% of congenital heart defects worldwide. It is characterized by a communication between the aortic and pulmonary arteries, with preservation of two normal semilunar valves. It is the result of an incomplete separation of the aorticopulmonary trunk that normally occurs in early fetal development with formation of the spiral septum.Burakovsky, V. I., Falkovsky, G. E., & Ivanitsky, A. V. (1984).

The frontal sinuses are one of the four pairs of paranasal sinuses that are situated behind the brow ridges. Sinuses are mucosa-lined airspaces within the bones of the face and skull. Each opens into the anterior part of the corresponding middle nasal meatus of the nose through the frontonasal duct which traverses the anterior part of the labyrinth of the ethmoid. These structures then open into the semilunar hiatus in the middle meatus.

The adrenal glands are located on both sides of the body in the retroperitoneum, above and slightly medial to the kidneys. In humans, the right adrenal gland is pyramidal in shape, whereas the left is semilunar or crescent shaped and somewhat larger. The adrenal glands measure approximately 3 cm in width, 5.0 cm in length, and up to 1.0 cm in thickness. Their combined weight in an adult human ranges from 7 to 10 grams.

The aortic valve is a valve in the human heart between the left ventricle and the aorta. It is one of the two semilunar valves of the heart, the other being the pulmonary valve. The heart has four valves; the other two are the mitral and the tricuspid valves. The aortic valve normally has three cusps or leaflets, although in 1–2% of the population it is found to congenitally have two leaflets.

The wingspan is 46–51 mm. The forewings are dark yellowish-brown with a strongly reduced pattern of weakly semilunar submarginal fascia and blurred medial bands. There is a small, triangular brown discal spot and light bluish suffusion in the apical field, as well as brown obfuscation on the submarginal field. The hindwings are brighter than the forewings, with the costal field creamy yellow and the anal part darker with an indistinct brown transverse band.

The biventer lobule (or biventral lobule) is a region of the cerebellum. It is triangular in shape; its apex points backward, and is joined by the gray band to the pyramid. The lateral border is separated from the inferior semilunar lobule by the postpyramidal fissure. The base is directed forward, and is on a line with the anterior border of the tonsil, and is separated from the flocculus by the postnodular fissure.

One of the simplest methods of assessing the heart's condition is to listen to it using a stethoscope. In a healthy heart, there are only two audible heart sounds, called S1 and S2. The first heart sound S1, is the sound created by the closing of the atrioventricular valves during ventricular contraction and is normally described as "lub". The second heart sound, S2, is the sound of the semilunar valves closing during ventricular diastole and is described as "dub".

These molecules interact to form the elastic fibers in the ventricularis layer of the semilunar valves. Fibrillin-1 and fibrillin-2 are also crucial for the development of elastic fibers in the aorta. While expression of fibrillin-2 decreases significantly after fetal development, the expression of fibrillin-1 continues into adulthood. This supports the idea that fibrilin-2 dictates the development of early elastic fibers, while fibrillin-1 provides the structural support of mature elastic fibers.

The net result is that, while contraction causes ventricular pressures to rise sharply, there is no overall change in volume because of the closed valves. The isovolumetric contraction phase lasts about 0.03 s, but this short period of time is enough to build up a sufficiently high pressure that eventually overcomes that of the aorta and the pulmonary trunk upon opening of the semilunar valves. This process, therefore, helps maintain the correct unidirectional flow of blood through the heart and circulatory system.

Two coronary arteries originate from the left side of the heart at the beginning (root) of the aorta, just after the aorta exits the left ventricle. There are three aortic sinuses (dilations) in the wall of the aorta just superior to the aortic semilunar valve. Two of these, the left posterior aortic sinus and anterior aortic sinus, give rise to the left and right coronary arteries, respectively. The third sinus, the right posterior aortic sinus, typically does not give rise to a vessel.

Its upper front surface is circled and convex, and forms much of the sternocostal surface of the heart. Its under surface is flattened, forming part of the diaphragmatic surface of the heart that rests upon the diaphragm. Its posterior wall is formed by the ventricular septum, which bulges into the right ventricle, so that a transverse section of the cavity presents a semilunar outline. Its upper and left angle forms a conical pouch, the conus arteriosus, from which the pulmonary artery arises.

The closure of the semilunar valves causes the second heart sound. The aortic valve, which has three cusps, lies between the left ventricle and the aorta. During ventricular systole, pressure rises in the left ventricle and when it is greater than the pressure in the aorta, the aortic valve opens, allowing blood to exit the left ventricle into the aorta. When ventricular systole ends, pressure in the left ventricle rapidly drops and the pressure in the aorta forces aortic valve to close.

The second heart sound, or S2, forms the "dub" of "lub-dub" and is composed of components A2 (aortic valve closure) and P2 (pulmonary valve closure). Normally A2 precedes P2 especially during inspiration where a split of S2 can be heard. It is caused by the closure of the semilunar valves (the aortic valve and pulmonary valve) at the end of ventricular systole and the beginning of ventricular diastole. As the left ventricle empties, its pressure falls below the pressure in the aorta.

Oxygenated blood enters the systemic circulation when leaving the left ventricle, through the aortic semilunar valve. The first part of the systemic circulation is the aorta, a massive and thick-walled artery. The aorta arches and gives branches supplying the upper part of the body after passing through the aortic opening of the diaphragm at the level of thoracic ten vertebra, it enters the abdomen. Later it descends down and supplies branches to abdomen, pelvis, perineum and the lower limbs.

This has three cusps which are not attached to any papillary muscles. When the ventricle relaxes blood flows back into the ventricle from the artery and this flow of blood fills the pocket-like valve, pressing against the cusps which close to seal the valve. The semilunar aortic valve is at the base of the aorta and also is not attached to papillary muscles. This too has three cusps which close with the pressure of the blood flowing back from the aorta.

The nodule (nodular lobe), or anterior end of the inferior vermis, abuts against the roof of the fourth ventricle, and can only be distinctly seen after the cerebellum has been separated from the medulla oblongata and pons. On either side of the nodule is a thin layer of white substance, named the posterior medullary velum. It is semilunar in form, its convex border being continuous with the white substance of the cerebellum; it extends on either side as far as the flocculus.

The semilunar valves close to prevent backflow into the heart. Since the atrioventricular valves remain closed at this point, there is no change in the volume of blood in the ventricle, so the early phase of ventricular diastole is called the isovolumic ventricular relaxation phase, also called isovolumetric ventricular relaxation phase. In the second phase of ventricular diastole, called late ventricular diastole, as the ventricular muscle relaxes, pressure on the blood within the ventricles drops even further. Eventually, it drops below the pressure in the atria.

The FBN-1 gene is involved in a variety of embryonic developmental programs. The microfibrils that are made from fibrillin-1 contribute to both elastic and non-elastic structures. The formation of the elastic fibers in the heart valves and the aorta require the involvement of both FBN-1 and FBN-2. It has been shown that both FBN-1 and FBN-2, along with the other components of elastic fibers, are expressed in the embryonic semilunar valves as early as 4 weeks of gestation.

Like all other chelicerates, and other arthropods in general, pterygotid eurypterids possessed segmented bodies and jointed appendages (limbs) covered in a cuticle composed of proteins and chitin. In pterygotids, the outer surface of the exoskeletons, ranging in size from small to gigantic, was composed of semilunar scales. The chelicerate body is divided into two tagmata (sections); the frontal prosoma (head) and posterior opisthosoma (abdomen). The appendages were attached to the prosoma, and were characterized in pterygotids by being small and slender and lacking spines.

Propulsion of lymph from one lymphangion to next A lymphangion is the functional unit of a lymph vessel that lies between two semilunar (half moon- shaped) valves. Lymph vessels are channels larger than the lymph capillaries that have thicker walls, valves in their lumen and smooth muscles in their walls, thus lymph vessel lymphangion is muscular and capable of contracting on its own. Additionally the lymph in it is propelled forward only because of force exerted on its walls from the exterior. Such forces include skeletal muscle contractions and arterial pulsations.

Also, the inspiration during respiration provides a suction pressure within the lumen. The semilunar valves are directed towards the flow of the lymph and open when the pressure in the first lymphangion is greater than the pressure in the next lymphangion. Pressure in the first lymphangion may increase because of smooth muscle contraction (in lymph vessel) or because of pressure on the walls from outside (in a capillary) result because of. Alternatively, pressure within the next lymphangion may decrease because of negative pressure as a result of inspiration.

In a healthy young adult, blood enters the atria and flows to the ventricles via the opened atrioventricular valves (tricuspid and mitral valves). Atrial contraction rapidly follows, actively pumping about 30% of the returning blood. As diastole ends, the ventricles begin depolarizing and, while ventricular pressure starts to rise owing to contraction, the atrioventricular valves close in order to prevent backflow to the atria. At this stage, which corresponds to the R peak or the QRS complex seen on an ECG, the semilunar valves (aortic and pulmonary valves) are also closed.

Its anterior surface is smooth, concave, and forms the upper part of the semilunar notch. Its borders present continuations of the groove on the margin of the superior surface; they serve for the attachment of ligaments: the back part of the ulnar collateral ligament medially, and the posterior ligament laterally. From the medial border a part of the flexor carpi ulnaris arises; while to the lateral border the anconeus is attached. The coronoid process is a triangular eminence projecting forward from the upper and front part of the ulna.

From the inner surface of this plate and the compact layer below it trabeculæ arch forward toward the olecranon and coronoid and cross other trabeculæ, passing backward over the medullary cavity from the upper part of the shaft below the coronoid. Below the coronoid process there is a small area of compact bone from which trabeculæ curve upward to end obliquely to the surface of the semilunar notch which is coated with a thin layer of compact bone. The trabeculæ at the lower end have a more longitudinal direction.

Initially, as the muscles in the ventricle contract, the pressure of the blood within the chamber rises, but it is not yet high enough to open the semilunar (pulmonary and aortic) valves and be ejected from the heart. However, blood pressure quickly rises above that of the atria that are now relaxed and in diastole. This increase in pressure causes blood to flow back toward the atria, closing the tricuspid and mitral valves. Since blood is not being ejected from the ventricles at this early stage, the volume of blood within the chamber remains constant.

Its posterior surface, directed backward, is triangular, smooth, subcutaneous, and covered by a bursa. Its superior surface is of quadrilateral form, marked behind by a rough impression for the insertion of the Triceps brachii; and in front, near the margin, by a slight transverse groove for the attachment of part of the posterior ligament of the elbow-joint. Its anterior surface is smooth, concave, and forms the upper part of the semilunar notch. Its borders present continuations of the groove on the margin of the superior surface; they serve for the attachment of ligaments, viz.

In June 2001, contestant Shane O'Doherty was asked, as the 13th (£250,000) question, in what part of the body the lunula was. He used his phone-a-friend lifeline to ring a physician, who said it was in the heart, which was the answer he then gave. The desired answer was the fingernail, and so O'Doherty's winnings fell from £125,000 back to the guaranteed £32,000. In fact, a lunula is any crescent or moon-shaped structure, including both the white base of the fingernail and the segments of the semilunar heart valves.

This bulge is the result of the creation of a false lumen due to the vast amount of blood seepage from the aortas and surrounding veins. In some cases it is not uncommon to see degeneration in the ascending and descending aorta and the atrioventricular and semilunar valves due to elastolysis or breakdown and loss of elastic fibers. These connective tissue malfunctions are traceable to mutations, and lack of genes encoding for important components such as collagens, and micro- fibril-associated glycoproteins. Breakdown among these connective layers eventually compromises the integrity of the aortic lumen.

When prepared, the drumsticks are usually garnished with mint leaves and served with laccha (finely sliced half moons, with a squeeze of lemon and a pinch of salt) onions. Samosa is a stuffed snack consisting of a fried or baked triangular, semilunar or tetrahedral pastry shell with a savory filling, which may include spiced potatoes, onions, peas, coriander, and lentils, or ground lamb or chicken. The size and shape of a samosa, as well as the consistency of the pastry used, can vary considerably. In some regions of Central Asia (i.e.

Consequently, this initial phase of ventricular systole is known as isovolumic contraction, also called isovolumetric contraction. In the second phase of ventricular systole, the ventricular ejection phase, the contraction of the ventricular muscle has raised the pressure within the ventricle to the point that it is greater than the pressures in the pulmonary trunk and the aorta. Blood is pumped from the heart, pushing open the pulmonary and aortic semilunar valves. Pressure generated by the left ventricle will be appreciably greater than the pressure generated by the right ventricle, since the existing pressure in the aorta will be so much higher.

Wiggers diagram of various events of a cardiac cycle, including a phonocardiogram at bottom. The sounds result from vibrations created by closure of the heart valves, there are at least two: the first when the atrioventricular valves (tricuspid and mitral) close at the beginning of systole and the second when the aortic valve and pulmonary valve (semilunar valves) close at the end of systole. It allows the detection of subaudible sounds and murmurs, and makes a permanent record of these events. In contrast, the stethoscope cannot always detect all such sounds or murmurs, and it provides no record of their occurrence.

The pulmonary valve (sometimes referred to as the pulmonic valve) is the semilunar valve of the heart that lies between the right ventricle and the pulmonary artery and has three cusps. Similar to the aortic valve, the pulmonary valve opens in ventricular systole, when the pressure in the right ventricle rises above the pressure in the pulmonary artery. At the end of ventricular systole, when the pressure in the right ventricle falls rapidly, the pressure in the pulmonary artery will close the pulmonary valve. The closure of the pulmonary valve contributes the P2 component of the second heart sound (S2).

The semilunar woman's knife ulu is used to process and cut skins for clothing and footwear. Women made most clothing of caribou (wild caribou Rangifer tarandus granti and domestic reindeer Rangifer tarandus tarandus) and sealskin. The English words kuspuk (parka cover or overshirt) and mukluk (skin boot) which is derived from the Yup'ik word qaspeq and maklak. Before the arrival of the Russian fur traders (promyshlennikis), caribou and beaver skins were used for traditional clothing but Northern Indigenous peoples were compelled by to sell most of their furs to the Russians and substitute (inferior) manufactured materials.

As Professor of Anatomy and Surgery at the University of Bologna from 1556, he established anatomy as a major branch of medicine for the first time. Aranzi combined anatomy with a description of pathological processes, based largely on his own research, Galen, and the work of his contemporary Italians. Aranzi discovered the 'Nodules of Aranzio' in the semilunar valves of the heart and wrote the first description of the superior levator palpebral and the coracobrachialis muscles. His books (in Latin) covered surgical techniques for many conditions, including hydrocephalus, nasal polyp, goitre and tumours to phimosis, ascites, haemorrhoids, anal abscess and fistulae.

A few examples of pottery were discovered, showing evidence of having been used as cooking bowls or pots. Associated with them were household utensils— spoons made from bivalves, ladles made from the greater halves of hollowed-out well-grown conch shells; and cups, bowls, trays and mortars of wood. Trays were comparatively shallow, oval in outline and varying in length; the ends were narrowed and truncated to form handles, the upper faces of which were usually decorated with neatly cut-in disc-like or semilunar figures or depressions. Atlatls and arrows were found, but no bows.

The lymphatic circulation begins with blind ending (closed at one end) highly permeable superficial lymph capillaries, formed by endothelial cells with button-like junctions between them that allow fluid to pass through them when the interstitial pressure is sufficiently high. These button-like junctions consist of protein filaments like platelet endothelial cell adhesion molecule-1, or PECAM-1. A valve system in place here prevents the absorbed lymph from leaking back into the ISF. There is another system of semilunar (semi=half; lunar=related to the Moon) valves that prevents back-flow of lymph along the lumen of the vessel.

Hooking home a mid-range shot with his left foot, Kim made the headed goal at the 31st minute. On 20 September 2017 in the 27th round match of the K League 1 against Sangju Sangmu, Kim was ousted from the game for warnings accumulated at the 40th minute. On 15 October 2017, it turned out that Kim suffered a semilunar valve injury and for this reason Kim had to have surgery in Japan, being unable to play remaining games of the season. Kim played 29 games, scoring two goals, being shown nine yellow cards and one red card during this season.

The posterior gluteal line (superior curved line), the shortest of the three gluteal lines, begins at the iliac crest, about 5 cm in front of its posterior extremity; it is at first distinctly marked, but as it passes downward to the upper part of the greater sciatic notch, where it ends, it becomes less distinct, and is often altogether lost. Behind this line is a narrow semilunar surface, the upper part of which is rough and gives origin to a portion of the Gluteus maximus; the lower part is smooth and has no muscular fibers attached to it.

On the anterior surface of the petrous portion of the temporal bone are seen the eminence caused by the projection of the superior semicircular canal; in front of and a little lateral to this a depression corresponding to the roof of the tympanic cavity; the groove leading to the hiatus of the facial canal, for the transmission of the greater superficial petrosal nerve and the petrosal branch of the middle meningeal artery; beneath it, the smaller groove, for the passage of the lesser superficial petrosal nerve; and, near the apex of the bone, the depression for the semilunar ganglion and the orifice of the carotid canal.

Frequently, the flexor pollicis longus arises from the lower part of the coronoid process by a rounded bundle of muscular fibers. The semilunar notch is a large depression, formed by the olecranon and the coronoid process, and serving as articulation with the trochlea of the humerus. About the middle of either side of this notch is an indentation, which contracts it somewhat, and indicates the junction of the olecranon and the coronoid process. The notch is concave from above downward, and divided into a medial and a lateral portion by a smooth ridge running from the summit of the olecranon to the tip of the coronoid process.

The function of the right heart, is to collect de-oxygenated blood, in the right atrium, from the body via the superior vena cava, inferior vena cava and from the coronary sinus and pump it, through the tricuspid valve, via the right ventricle, through the semilunar pulmonary valve and into the pulmonary artery in the pulmonary circulation where carbon dioxide can be exchanged for oxygen in the lungs. This happens through the passive process of diffusion. In the left heart oxygenated blood is returned to the left atrium via the pulmonary vein. It is then pumped into the left ventricle through the bicuspid valve and into the aorta for systemic circulation.

To the right of the septum primum and also coming down from the roof of the primitive atrium, descends a semilunar-shaped partition called the septum secundum. The free edges of the septum secundum produce an orifice called foramen ovale, which closes after birth when the septum primum and secundum fuse to each other completing the formation of the atrial septum. The atrial canal is in turn divided into a right and left side by the atrioventricular septum, which originates from the union of the dorsal and ventral endocardial cushion. The right side of the atrial canal will become the tricuspid valve and the left will become the bicuspid valve.

The linea semilunaris (also semilunar line or Spigelian line) is a curved tendinous intersection found on either side of the rectus abdominis muscle. Each corresponds with the lateral border of the rectus abdominis, extends from the cartilage of the ninth rib to the pubic tubercle, and is formed by the aponeurosis of the internal oblique at its line of division to enclose the rectus, reinforced anteriorly by the external oblique and posteriorly by the transversus abdominis above the arcuate line (also known as linea semicircularis or Douglas' line). A hernia through the linea semilunaris is called a Spigelian hernia, which is also referred to as a spontaneous lateral ventral hernia.

The burrowing invertebrates that make up large portions of sandy beach ecosystems are known to travel relatively great distances in cross-shore directions as beaches change on the order of days, semilunar cycles, seasons, or years. The distribution of some species has been found to correlate strongly with geomorphic datums such as the high tide strand and the water table outcrop. Since the foreshore is alternately covered by the sea and exposed to the air, organisms living in this environment must have adaptions for both wet and dry conditions. Hazards include being smashed or carried away by rough waves, exposure to dangerously high temperatures, and desiccation.

An efferent lymph vessel may directly drain into one of the (right or thoracic) lymph ducts, or may empty into another lymph node as its afferent lymph vessel. Both the lymph ducts return the lymph to the blood stream by emptying into the subclavian veins The functional unit of a lymph vessel is known as a lymphangion, which is the segment between two semilunar valves. Since it is contractile, depending upon the ratio of its length to its radius, it can act either like a contractile chamber propelling the fluid ahead, or as a resistance vessel tending to stop the lymph in its place.

' "By such organs are meant those which were formerly of greater physiological significance than at present." He picked up on Darwin's concept of "rudimentary" organs such as listed in The Descent of Man: the muscles of the ear, wisdom teeth, the appendix, the coccyx (tail bone), body hair, and the semilunar fold in the corner of the eye. The list, however, contains structures which today are known to be essential, and thus represents a historical record of the physiologic understanding of the day. Evolutionists have used the credited examples of this list as an argument for evolution as they are evolutionary leftovers, of little use to the current organism.

The surface of the fasciole here and there is marked by obscure, irregular, short, oblique, fine ridges at right angles to the lines of growth. In front of the fasciole are (on the penultimate whorl fourteen) low, feeble, protractivcly oblique ribs, with much wider shallow interspaces, hardly reaching the suture in front on the spire or the periphery on the body whorl. The spiral sculpture is confined to the whorl in front of the fasciolc and consists of (on the penultimate whorl about fifteen) fine, sharp incised lines, on the body of the whorl rather distant, the interspaces flat and often unequal but toward the siphonal canal closer and more regular. The aperture is semilunar.

The atrioventricular rings serve for the attachment of the muscular fibers of the atria and ventricles, and for the attachment of the bicuspid and tricuspid valves. The left atrioventricular ring is closely connected, by its right margin, with the aortic arterial ring; between these and the right atrioventricular ring is a triangular mass of fibrous tissue, the Fibrous trigone, which represents the os cordis seen in the heart of some of the larger animals, such as the ox. Lastly, there is the tendinous band, already referred to, the posterior surface of the conus arteriosus. The fibrous rings surrounding the arterial orifices serve for the attachment of the great vessels and semilunar valves, they are known as The aortic annulus.

The trochlear notch (also semilunar notch, or greater sigmoid cavity) is a large depression in the upper extremity of the ulna that fits the trochlea of the humerus (the bone directly above the ulna in the arm) as part of the elbow joint. It is formed by the olecranon and the coronoid process. About the middle of either side of this notch is an indentation, which contracts it somewhat, and indicates the junction of the olecranon and the coronoid process. The notch is concave from above downward, and divided into a medial and a lateral portion by a smooth ridge running from the summit of the olecranon to the tip of the coronoid process.

Many biologists studying these fairly unknown creatures consider their reproduction one of the most important concepts of the species to understand, because most of the fish's behavior is based on its reproduction habits. Bayou killifish reproduce sexually and are oviparous, meaning that they give birth via laying eggs. This is a characteristic that most of the fish in the order Cyprinodontiformes share, though some may be viviparous. Little is known about the spawning seasons of the bayou killifish, however biologists do know that this species of killifish spawns mainly during the Spring, more specifically during the Spring Tides—periods of 3 to 6 days biweekly, that occur in a period known as the semilunar phase.

Behind this line is a narrow semilunar surface, the upper part of which is rough and gives origin to a portion of the Glutæus maximus; the lower part is smooth and has no muscular fibers attached to it. The anterior gluteal line (middle curved line), the longest of the three, begins at the crest, about 4 cm behind its anterior extremity, and, taking a curved direction downward and backward, ends at the upper part of the greater sciatic notch. The space between the anterior and posterior gluteal lines and the crest is concave, and gives origin to the Glutæus medius. Near the middle of this line a nutrient foramen is often seen.

It begins gametogenesis in January and finishes in May, during which its gonads are nearly completely filled with gametes. Spawning usually occurs between May and June, but sometimes can take until October for all the urchins to finish releasing their eggs and sperm. The start and end times of these periods are not always rigid and can vary by a couple months. This data on H. mammillatus’ reproduction indicates a possible lunar or semilunar cycle in spawning and gametogenesis, meaning that H. mammillatus may take temporal cues from the moon. Given that spawning did not always happen during the same phase of moon, other factors may contribute to the timing of H. mammillatus’ reproductive stages (such as the tidal cycle, for example).

As both of these species and the genera they are assigned to are diagnosed based on features of the telson (the posteriormost segment of the body), chelicerae (frontal appendages), coxae and the metastoma (a large plate that is part of the abdomen), it is impossible to assign Necrogammarus to either since the Necrogammarus specimen lacks said body parts. It is possible that it represents a fragment of either of them or a distinct genus. There are several features that are shared between all pterygotids and thus very likely were present in Necrogammarus as well. The outer surface of their exoskeletons was covered in an ornamentation of semilunar scales unseen in other eurypterid groups and their appendages lacked spines (unlike many other groups, particularly primitive pterygotioids).

Charles Darwin was familiar with the concept of vestigial structures, though the term for them did not yet exist. He listed a number of them in The Descent of Man, including the muscles of the ear, wisdom teeth, the appendix, the tail bone, body hair, and the semilunar fold in the corner of the eye. Darwin also noted, in On the Origin of Species, that a vestigial structure could be useless for its primary function, but still retain secondary anatomical roles: "An organ serving for two purposes, may become rudimentary or utterly aborted for one, even the more important purpose, and remain perfectly efficient for the other.... [A]n organ may become rudimentary for its proper purpose, and be used for a distinct object."Darwin, Charles (1859).

This opening is closed by the union of the septum primum with the septum intermedium, and the communication between the atria is re-established through an opening which is developed in the upper part of the septum primum; this opening is known as the foramen ovale (ostium secundum of Born) and persists until birth. A second septum, the septum secundum, semilunar in shape, grows downward from the upper wall of the atrium immediately to the right of the primary septum and foramen ovale. Shortly after birth it fuses with the primary septum, and by this means the foramen ovale is closed, but sometimes the fusion is incomplete and the upper part of the foramen remains patent. The limbus fossæ ovalis denotes the free margin of the septum secundum.

These are the first heart sound (S1) and second heart sound (S2), produced by the closing of the atrioventricular valves and semilunar valves, respectively. In addition to these normal sounds, a variety of other sounds may be present including heart murmurs, adventitious sounds, and gallop rhythms S3 and S4. Heart murmurs are generated by turbulent flow of blood and a murmur to be heard as turbulent flow must require pressure difference of at least 30 mm of hg between the chambers and the pressure dominant chamber will out flow the blood to non dominant chamber in diseased condition which leads to Left-to- right shunt or Right-to-left shunt based on the pressure dominance. Turbulence may occur inside or outside the heart; if it occurs outside the heart then the turbulence is called Bruit.

Skeleton cast, National Museum, Prague The autapomorphies that distinguish Epachthosaurus from other genera are: middle and caudal dorsal vertebrae with unique articular processes extending ventrolaterally from the hyposphene; a strongly developed intraprezygapophyseal lamina, and processes projecting laterally from the dorsal portion of the spinodiapophyseal lamina; hyposphene- hypantrum articulations in caudals 1–14; and a pedal phalangeal formula of 2-2-3-2-0. The genus shares the following apomorphies with various titanosaurians: caudal vertebrae with ventrally expanded posterior centrodiapophyseal laminae; six sacral vertebrae; an ossified ligament or tendon above the sacral neural spines; procoelous proximal, middle, and distal caudal centra with well-developed distal articular condyles; semilunar sternal plates with cranioventral ridges; humeri with squared proximolateral margins and proximolateral processes; unossified carpals; greatly reduced manual phalanges; nearly horizontal, craniolaterally expanded iliac preacetabular processes; pubes proximodistally longer than ischia; and transversely expanded ischia.

The Asterolepis has multiple interlocking dermal plates that form its body armour; anterior ventro-lateral (AVL) plate, posterior lateral plate, posterior ventro-lateral (PVL) plate, anterior median dorsal (AMD) plate, two anterior dorsolateral (ADL) plates, two mixilateral plates, and one posterior median dorsal (PMD) plate. The area considered to be the face is also armored with interlocking dermal plates; nuchal plate, paired paranuchal plate, paired postmarginal plate, postpineal plate, premedian plate, paired lateral plate, and semilunar plate. The cheek region of the head shield is formed by three bones: prelateral, opercular/ sub-marginal, and infraprelateral plates where the prelateral and submarginal plates form the lateral region and the infraprelateral plates form the ventral region The paired pectoral fins are also plated with plates of the dorsal central series (CD1-CD4), plates of the medial marginal series (MM1-MM4), and the plates of the lateral marginal series (ML1-ML4). The postpineal plate is broader than longer.