Ques. A vein possesses a large lumen because
A. tunica media and tunica externa form a single coat
B. tunica interna and tunica media form a single coat
C. tunica interna, tunica media and tunica externa are thin
D. tunica media is a thin coat.
Answer:D
Ques. A vein possesses a large lumen because
A. tunica media and tunica externa form a single coat B. tunica interna and tunica media form a single coat C. tunica interna, tunica media and tunica externa are thin D. tunica media is a thin coat.