Which of the Following is TRUE of Veins

Question

Which of the following is TRUE of veins?
A)Veins have more smooth muscle than arteries.
B)Veins have smaller lumens than arteries.
C)Veins have thinner walls than arteries.
D)Veins have more elastic fibers than arteries.

Accepted Answer

Veins have thinner walls than arteries. While arteries have thick walls composed of smooth muscle and elastic fibers, veins have thinner walls with less smooth muscle and elastic fibers. This is because veins do not need to withstand the same level of pressure as arteries, as they are carrying blood back to the heart at a lower pressure.