A specimen of pia mater includes a vessel whose wall doesn't have the tunica media, the tunica externa is adherent to the surrounding tissues, the intima is composed of a basement membrane and endothelium. What vessel is it?

Answer options

1. Muscular artery
2. Nonmuscular vein
3. Muscular vein with underdeveloped muscular elements
4. Arteriole
5. Artery of mixed type

Explanation

Veins do not have tunica Media because they do not contract. Tunica media usually contain the muscular layer of arteries.