Question

Which of the following is NOT one of the three coats that comprise the walls of arteries and veins?

A. Tunica intima
B. Tunica media
C. Tunica externa
D. Tunica circularis

Answer 1

The tunica circularis is not one of the three coats that comprise the walls of arteries and veins.

Step-by-step explanation:

The three coats that comprise the walls of arteries and veins are the tunica intima, tunica media, and tunica externa.

The tunica circularis is not one of the coats that make up the walls of arteries and veins.

The tunica circularis is not a term commonly used in the context of artery and vein anatomy.