Which Vessels Have Valves to Prevent Backflow of Blood

Question

Which vessels have valves to prevent backflow of blood?
A) veins
B) arteries
C) capillaries
D) arterioles

Accepted Answer

Veins have valves to prevent backflow of blood, as they are responsible for carrying blood back to the heart against gravity. Arteries, capillaries, and arterioles do not have valves.