Which Vessels Have the Thickest Tunica Media

Question

Which vessels have the thickest tunica media?
A) Small arteries
B) Small veins
C) Large arteries
D) Large veins
E) Capillaries

Accepted Answer

Large arteries have a thick tunica media composed of abundant smooth muscle cells and elastic fibers, which allows them to withstand and buffer the high pressure from the heart's contraction. Small arteries and veins have a thin tunica media compared to large vessels, while capillaries lack a tunica media altogether. Large veins have a thinner tunica media compared to large arteries.