What Vessels Carry Oxygen-Rich Blood to the Left Atrium

Question

What vessels carry oxygen-rich blood to the left atrium?
A)Superior and inferior vena cavae
B)Pulmonary veins
C)Pulmonary arteries
D)Both superior and inferior vena cavae and pulmonary veins

Accepted Answer

Pulmonary veins are the only vessels that carry oxygen-rich blood from the lungs to the left atrium of the heart. The superior and inferior vena cavae bring deoxygenated blood from the body to the right atrium, and the pulmonary arteries carry deoxygenated blood from the right ventricle to the lungs for oxygenation.