Aorta (aorta) - the largest arterial vessel in the body, which runs all the arteries , forming a large circulation . It isolated the ascending portion (pars ascendens aortae), aortic arch (arcus aortae) and a descending portion (pars dascendens aortae).
The rising part of the aorta is a continuation of the arterial cone of the left ventricle, starting from the opening of the aorta. Initial expansion of the aorta called the aortic bulb (bulbus aortae). Behind the sternum , at the third intercostal spaces, it goes up and right, and level II edge goes into the aortic arch.
Aortic arch its convexity facing up. Depart from the convexity of the three major vessels: brachiocephalic trunk (truncus brachiocephalicus), left common carotid artery (a. carotis communis sinistra) and the left subclavian artery (a. subclavia sinistra). Brachiocephalic trunk at the right sternal-clavicular joint is divided into two branches: the right common carotid artery (a. carotis communis dextra) and right subclavian artery (a. subclavia dextra). Heading down the front, the arch of the aorta at the level III thoracic vertebra moves in the downward portion of the aorta.
The descending aorta begins at tel III-IV dorsal vertebrae, and narrowing, changes in the median sacral artery (a. sacralis mediana), which runs along the front surface of the sacrum. The descending aorta is divided into thoracic aorta (pars thoracica aortae), located above the diaphragm and the abdominal aorta (pars abdominalis aortae), located under the diaphragm. At level IV lumbar vertebra from the descending aorta diverge right and left common iliac artery (aa. iliacae communea daxtra et sinistra).
a., aa. — arteria, arteriae (artery, the artery)
lig., ligg. — ligamentum, ligamenta (ligament, the ligaments)
m., mm. — musculus, musculi (muscle, the muscle)
n., nn. — nervus, nervi (nerve, the nerve)
r., rr. — ramus, rami (branch)
s. — seu (or)
v., vv. — vena, venae (vienna)