Which Blood Vessels Have Very Thin Walls and are Called

Question

Which blood vessels have very thin walls and are called the exchange vessels?
A) Arterioles
B) Veins
C) Capillaries
D) Arteries

Accepted Answer

Capillaries are the smallest blood vessels in the body and are responsible for the exchange of gases, nutrients, and waste products between the blood and the tissues. They have very thin walls made up of a single layer of endothelial cells, which allows for efficient exchange. Arterioles are small arteries that regulate blood flow, veins carry blood back to the heart, and arteries are larger vessels that carry blood away from the heart.