Blood is returned to the right side of the heart by the:
A) aorta
B) vena cavae
C) pulmonary vein
D) pulmonary artery
B
Explanation: Blood is returned to the right side of the heart by the vena cavae. The aorta carries blood away from the left side of the heart. Pulmonary arteries carry blood away from the right side of the heart. The pulmonary veins return blood to the left side of the heart.
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