Another High resolution model of arteries of the brain. All the structures depicted are anatomically accurate.

Buy this one instead of my other model, because it has a lot of branches to the arteries and hence looks more realistic.

Info:

The Circle of Willis (also called Willis' Circle, Loop of Willis, cerebral arterial circle, and Willis Polygon) is a circulatory anastomosis that supplies blood to the brain and surrounding structures. It is named after Thomas Willis (1621–1675), an English physician.

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)
Basilar artery

The middle cerebral arteries, supplying the brain, are not considered part of the circle.