Brain and neck arteries, CT angiogram
Coloured 3D computed tomography (CT) angiogram showing the arteries (red) of the brain and neck from below and behind. Just below centre is the aortic arch, where the body's main artery, the aorta, leaves the heart. The carotid arteries branch from the aortic arch and then further divide into cerebral arteries which supply the brain with oxygenated blood., by VSEVOLOD ZVIRYK/SCIENCE PHOTO LIBRARY
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