In a cross section through an artery and vein running parallel in your leg, which would necessarily be the artery?
A) The vessel with the largest interior diameter
B) The vessel with more muscle tissue and elastin in the wall
C) The vessel lined with endothelium
D) The vessel with valves to prevent backflow
E) All of the above

Question

Quizplus · Accepted Answer

Arteries have thicker walls, featuring more muscle tissue and elastin. This allows arteries to withstand the high pressure and changes in pressure that occur as blood is pumped from the heart. Veins, on the other hand, have thinner walls and less muscle tissue, allowing for the expansion of the vessel to accommodate larger volumes of blood. The interior diameter and presence of valves are not definitive characteristics of arteries.

In a Cross Section Through an Artery and Vein Running