4. Blood is a constantly circulating fluid providing the body with nutrition, oxygen, and waste removal. What organ pumps blood all throughout the body?
A, the lungs B. the heart D. the blood vessels and capillaries Comunionismotanertsond C. the kidneys
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Answer:
B heart. heart is the organ that pumps blood throughout the body. Why heart? Your heart has a special electrical system called the cardiac conduction system. This system controls the rate and rhythm of the heartbeat. With each heartbeat, an electrical signal travels from the top of the heart to the bottom. As the signal travels, it causes the heart to contract and pump blood
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