The _____ are only one cell in thickness and are the smallest blood vessels in the body.
A) arterioles
B) venules
C) capillaries
D) coronary arteries

Question

The _____ are only one cell in thickness and are the smallest blood vessels in the body.
A) ​arterioles
B) ​venules
C) ​capillaries
D) ​coronary arteries

Quizplus · Accepted Answer

Capillaries are the smallest blood vessels in the body and are only one cell in thickness. They are responsible for exchanging oxygen, nutrients, and waste products between the blood and the tissues. Arterioles are small arteries that control blood flow into the capillaries, while venules are small veins that control blood flow out of the capillaries. Coronary arteries are larger arteries that supply blood to the heart muscle.

The _____ Are Only One Cell in Thickness and Are