MEDICAL
RECTUM AND ANUS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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How does the heart work?
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It pumps blood first to the lungs, back to the heart and then around the rest of the body.
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It pumps blood first to the rest of the body, back to the lungs and then to the heart.
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It pumps blood around the rest of the body, back to the heart and then to the lungs,
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None of the above
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Explanation:
Detailed explanation-1: -The right ventricle pumps the oxygen-poor blood to the lungs through the pulmonary valve. The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle through the mitral valve. The left ventricle pumps the oxygen-rich blood through the aortic valve out to the rest of the body.
Detailed explanation-2: -With each heartbeat, the heart sends blood throughout our bodies, carrying oxygen to every cell. After delivering the oxygen, the blood returns to the heart. The heart then sends the blood to the lungs to pick up more oxygen.
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