Elastic and smooth muscle fibers are primarily found in the tunica ________ of blood vessels.
A) collateralus
B) media
C) adventitia
D) intima

Question

Quizplus · Accepted Answer

Elastic and smooth muscle fibers are primarily found in the tunica media of blood vessels. The tunica media is the middle layer of a blood vessel wall, consisting primarily of concentric layers of smooth muscle cells and elastic fibers. The tunica adventitia is the outermost layer, consisting primarily of connective tissue fibers. The tunica intima is the innermost layer, consisting of endothelial cells and a thin layer of connective tissue. The tunica collateralus is not a recognized term in anatomy or physiology.

Elastic and Smooth Muscle Fibers Are Primarily Found in the Tunica