Circle of Willis



	The Circle of Willis is the joining area of several arteries at the bottom (inferior) side of the brain. At the Circle of Willis, the internal carotid arteries branch into smaller arteries that supply oxygenated blood to over 80% of the cerebrum.

Review Date: 6/24/2011
Reviewed By: Reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

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