Capillaries Consist of Only This Layer

Question

Capillaries consist of only this layer.
A) tunica intima
B) subendothelial layer
C) tunica media
D) tunica externa
E) vasa vasorum

Accepted Answer

Capillaries consist of only the tunica intima - a single layer of endothelial cells surrounded by a basement membrane. The subendothelial layer, tunica media, and tunica externa are present in larger blood vessels, while vasa vasorum refers to small blood vessels that supply the walls of larger blood vessels.