Which Structures Return Blood to the Heart

Question

Which structures return blood to the heart?
A) capillaries
B) veins
C) arteries
D) sinoatrial nodes

Accepted Answer

Veins are the structures that return blood to the heart. Capillaries are the smallest blood vessels that connect arterioles and venules, while arteries are blood vessels that carry blood away from the heart. Sinoatrial nodes are groups of cells in the heart that are responsible for initiating electrical impulses and pacing the heart.