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Arteries of the Neck and Head
...  upward to the posterior cerebral artery. This provides most of the oxygenated blood to the brain. Both the posterior communicating artery and the posterior cerebral artery can be found inside the circle of willis. The left common carotid artery, in turn, divides and forms the ICA or the internal carotid artery and the ECA or the external carotid artery. It is the internal carotid artery that  ...

Blood Supply to the Brain
...  of transporting the blood supply to the surface of the cerebrum, the dominant part of the human brain. They further branch out into posterior communicating arteries that are responsible for the circle of willis, also known as the cerebral arterial circle, to exist. This area may be treated like a pool party of the vessels that supply blood to the brain. This is where the common carotid  ...


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