Three arteries come off the Aortic Arch (from left to right) 1. Brachiocephalic Artery 2. Left Common Carotid Artery 3. Left Subclavian Artery. Then After the Aorta arches it then descends behind the heart and turns into the Descending Aorta which is then classified as either the Thoracic Descending Aorta or the Abdominal Descending Aorta.
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"largest" artery in the body is the aorta, which is the main artery that comes off the left ventricle.
aorta
The biggest artery is the aorta. When it comes off of the heart it's diameter is between 18 and 22 mm.
Aorta
PulmonaryThe main artery of the human circulatory system is called the aorta. It comes directly off of the heart, carrying oxygenated blood to other arteries that carry it to the body's cells. About the thickness of your thumb, it is also the largest artery.