Epithelial tissue forms part of which layer(s) of an artery wall? 1. tunica interna (intima)
2) tunica media
3) tunica externa
A) 1, 2, 3
B) 1 only
C) 1, 3 only
D) 1, 2 only

Question

Quizplus · Accepted Answer

The tunica interna (intima) is the innermost layer of an artery wall and is the only layer that contains epithelial tissue, specifically endothelial cells that line the lumen of blood vessels. The tunica media consists of smooth muscle and elastic fibers, and the tunica externa is made of connective tissue, neither of which are epithelial.

Epithelial Tissue Forms Part of Which Layer(s) of an Artery