Cross-Sectional Area is Highest In

Question

Cross-sectional area is highest in
A) arteries.
B) arterioles.
C) capillaries.
D) venules.
E) veins.

Accepted Answer

The cross-sectional area is highest in capillaries. This is because, although each capillary is very small, the body contains a vast number of them, which collectively provide a large surface area for the exchange of gases, nutrients, and waste products between blood and tissues.