In humans it passes over the heart from the left ventricle and runs down in front of the backbone. The left atrium's primary roles are to act as a holding chamber for blood returning from the lungs and to act as a pump to transport blood to other areas of the heart The main artery of the body, supplying oxygenated blood to the circulatory system. The aorta distributes blood from the left ventricle of the heart to the rest of the body. It leaves the heart and ascends, then descends back to create the arch. The aortic arch is the portion of the main artery that bends between the ascending and descending aorta. Transcript: A large vien carrying deoxygenated blood from the lower body A large vein carrying deoxygenated blood to the heart from the head, arms and upper body Denoting an apex.
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