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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