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The aorta (/eÉªËÉrtÉ/) is the main artery in the human body, originating from the left ventricle of the heart and extending down to the abdomen, where it splits into two smaller arteries (the common iliac arteries).The aorta distributes oxygenated blood to all parts of the body through the systemic circulation.he aorta (/eÉªËÉrtÉ/) is the main artery in the human body, originating from the left ventricle of the heart and extending down to the abdomen, where it splits into two smaller arteries (the common iliac arteries).
pl. aortae, aortas [L.] the great artery arising from the left ventricle, being the main trunk from which the systemic arterial system proceeds. See Table 9. See also aortic. abdominal aorta. the part of the descending aorta within the abdomen. ascending aorta. the first part of the aorta which passes dorsally and cranially. descending aorta. the aorta after it turns caudally at the aortic arch. overriding aorta. see overriding aorta. supravalvular aorta. the portion of aorta immediately above the aortic valve. terminal aorta. the segment of the aorta immediately before it divides into the iliac arteries.