Question

multiple choice question
the outermost layer of an arterys wall is called the

o tunica interna
o tunica externa
o tunica media
o endothelium

Explanation:

The tunica externa is the outermost layer of an artery wall. The tunica interna is the innermost layer, the tunica media is the middle - layer, and the endothelium is part of the tunica interna.

Answer:

B. tunica externa