The circle of Willis
A)provides an alternate source of blood should a vessel involved be compromised.
B)equalizes blood pressure.
C)a and b
D)Neither a nor b

Question

Quizplus · Accepted Answer

The circle of Willis is a circulatory anastomosis that supplies blood to the brain and surrounding structures. It provides redundancy (an alternate source of blood) in the cerebral circulation if one part is compromised and helps in equalizing the blood pressure in the brain's blood supply.

The Circle of Willis