The circle of Willis is a circulatory anastomosis that supplies blood to the brain and surrounding structures. The circle of Willis is a part of the cerebral circulation and is composed of the following arteries: ● Anterior cerebral artery (left and right) ● Anterior communicating artery ● Internal carotid artery (left and right) ● Posterior cerebral artery (left and right) ● Posterior communicating artery (left and right)
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