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What happens to the blood when the pulmonary artery pumps it into the lungs?

A. Blood is sent to the rest of the body.
B. Oxygen is unloaded and carbon dioxide is loaded into the blood.
C. Carbon dioxide is unloaded and oxygen is loaded into the blood.

User Ovg
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The answer is C. In comes new oxygen, and out goes used oxygen in the form of carbon dioxide.
User Gpvos
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