The Tunica Media Consists of _

Question

The tunica media consists of _.
A) smooth muscle and elastic fibers
B) collagen fibers surrounding the vessel exterior
C) endothelium and the subendothelial layer

Accepted Answer

The tunica media, the middle layer of blood vessel walls, is primarily composed of smooth muscle cells and elastic fibers. This composition allows the tunica media to regulate the diameter of the blood vessel, thereby controlling blood pressure and flow.