Circle of Willis
System
Cardiovascular
SNOMED CT
362047009
Circle of Willis
Definition
A circle of arteries that supply blood to the brain. The Circle of Willis comprises 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).The basilar artery and middle cerebral arteries, supplying the brain, are also considered part of the circle.
Also known as arterial circle of Willis, cerebral arterial circle — per UBERON
The Circle of Willis is a part of the Cardiovascular.