The Cerebral Arterial Circle Encircles Which Structure

Question

The cerebral arterial circle encircles which structure?
A) cerebellum
B) pons
C) medulla oblongata
D) infundibulum of the pituitary gland
E) tectum

Accepted Answer

The cerebral arterial circle, also known as the Circle of Willis, encircles the infundibulum of the pituitary gland. This structure is a circulatory anastomosis that supplies blood to the brain and surrounding structures.