The layer of the arteries and veins that contains smooth muscle tissue is the
A) tunica media
B) tunica intima
C) endothelium
D) both b and c above

Question

Quizplus · Accepted Answer

The tunica media is the layer of the arteries and veins that contains smooth muscle tissue, responsible for regulating blood vessel diameter and blood pressure. The tunica intima is the innermost layer of blood vessels, composed of endothelial cells and a basement membrane. The endothelium is a layer of cells that lines the inside of blood vessels, including the tunica intima. Therefore, choice A is the best answer as it correctly identifies the layer that contains smooth muscle tissue.

The Layer of the Arteries and Veins That Contains Smooth