The vena cava is a vein. It carries deoxygenated blood from the lower half of the body to the right atrium of the heart.The aorta begins at the top of the left ventricle, the heart's muscular pumping chamber.The heart pumps blood from the left ventricle into the aorta through the aortic valve. ... The coronary arteries branch off the ascending aorta to supply the heart with blood.
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