It originates from the Left Ventricle. It carries the oxygenated (pure) blood to
various parts of body through its numerous branches. At the origin, the flow of
blood from the left ventricle to aorta is controlled by Aortic Valve.
Normal aorta is 2.5-3.0cm in diameter at the origin.
The diameter gradually comes down as it gives away branches. Before bifurcating
in the abdomen it is about 1.5-2.0cm.
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