The Circle of Willis

Question 1

List some of the functions of The Circle of Willis

Answer 1

• Forms the main blood supply of the brain
• Helps to equalise blood pressure on both sides
• Unites the brains anterior and posterior supply of blood
• Provides alternative routes for blood if a carotid or vertebral artery becomes blocked

Question 2

There are 4 main functions of The Circle of Willis - List these

Answer 2

• Forms the main blood supply of the brain
• Helps to equalise blood pressure on both sides
• Unites the brains anterior and posterior supply of blood
• Provides alternative routes for blood if a carotid or vertebral artery becomes blocked

Question 3

How many paired components are there in The Circle of Willis

Answer 3

3

Question 4

Name the 3 main components in The Circle of Willis

Answer 4

Anterior Cerebral Arteries x2
Internal Carotid Arteries x2
Posterior Cerebral Arteries x2