| bifurcatio aortae | The division of the aorta into right and left common iliac arteries; it occurs at the level of the fourth and fifth lumbar vertebral body. Synonym: bifurcatio aortae. (05 Mar 2000) |
|---|---|
| bulbus aortae | The dilated first part of the aorta containing the aortic semilunar valves and the aortic sinuses. Synonym: bulbus aortae, arterial bulb. (05 Mar 2000) |
| valva aortae | The heart valve that divides the left ventricle and the aorta. The aortic valve opens during left ventricular contraction and then closes to prohibit the backwash of oxygenated blood from the aorta into the ventricle. The aortic valve has 3 valve cusps. (27 Sep 1997) |
| valvula semilunaris dextra valvae aortae | Right semilunar cusp of the aortic valve. (05 Mar 2000) |
| valvula semilunaris posterior valvae aortae | Posterior semilunar cusp of the aortic valve. (05 Mar 2000) |
| valvula semilunaris sinistra valvae aortae | Left semilunar cusp of the aortic valve. (05 Mar 2000) |
| rami mediastinales aortae thoracicae | Numerous small arteries supplying the pleura and lymph nodes of the posterior mediastinum. Synonym: rami mediastinales aortae thoracicae, posterior mediastinal arteries. (05 Mar 2000) |
| rami oesophageales aortae thoracicae | Branches arising directly from the anterior aspect of the portion of the thoracic aorta adjacent to the oesophagus, by which most of the oesophagus is supplied. Synonym: rami oesophageales aortae thoracicae. (05 Mar 2000) |
| rami pericardiaci aortae thoracicae | Small branches of thoracic aorta distributed to the pericardium, in the region of the oblique pericardial sinus, and to posterior mediastinal lymph nodes. Synonym: rami pericardiaci aortae thoracicae. (05 Mar 2000) |
| vestibulum aortae | The anterosuperior portion of the left ventricle of the heart immediately below the aortic orifice, having fibrous walls and affording room for the segments of the closed aortic valve. Synonym: Sibson's aortic vestibule, vestibulum aortae. (05 Mar 2000) |
| medionecrosis aortae idiopathica cystica | Loss of elastic and muscle fibres in the aortic media, with accumulation of mucopolysaccharide, sometimes in cystlike spaces between the fibres; a disease of unknown cause, which may be inherited and which predisposes to dissecting aneurysms. Synonym: Erdheim disease, medionecrosis aortae idiopathica cystica, medionecrosis of the aorta, mucoid medial degeneration. (05 Mar 2000) |
| sinus aortae | The space between the superior aspect of each cusp of the aortic valve and the dilated portion of the wall of the ascending aorta, immediately above each cusp. Synonym: sinus aortae, Petit's sinus, Valsalva's sinus. Arlt's sinus, an inconstant depression on the lower portion of the internal surface of the lacrimal sac. Barber's pilonidal sinus, pilonidal sinus occurring in barbers, usually in the web between the fingers, due to the burying of exogenous hairs by the alternate loosening and tightening of tissues of the hand by the manipulation of scissors. (05 Mar 2000) |
| isthmus aortae | A slight constriction of the aorta immediately distal to the left subclavian artery at the point of attachment of the ductus arteriosus. Synonym: isthmus aortae. (05 Mar 2000) |
| ostium aortae | The opening from the left ventricle into the ascending aorta; it is guarded by the aortic valve. Synonym: ostium aortae, aortic ostium. (05 Mar 2000) |
| arcus pedis longitudinalis pars lateralis | Formed by calcaneus, cuboid and two lateral metatarsals; the combined arch is supported normally by ligaments, intrinsic muscles, and the tendons of extrinsic muscles of the foot. Synonym: arcus pedis longitudinalis pars lateralis. (05 Mar 2000) |