A blood vessel has the following characteristics: outer layer of connective tissue, a thick layer of smooth muscle with elastic fibers, no valves. It is which of the following?
A)a vein
B)a venule
C)an artery
D)a capillary
E)a portal vessel

Question

Quizplus · Accepted Answer

Arteries have an outer layer of connective tissue and a thick layer of smooth muscle with elastic fibers. Unlike veins, arteries do not contain valves. The lack of valves allows for the high pressure and volume of blood flow from the heart to the rest of the body.

A Blood Vessel Has the Following Characteristics: Outer Layer of Connective