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How does the heart work?
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The heart is a muscular pump. Oxygen-rich blood from the lungs enters the left side of the heart and is pumped to the organs. Veins carry the blood back to the right side of the heart. The blood is then pumped back to the lungs.
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Previous:
Back
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Book:
Best Ever Q&A
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Section:
Science & Technology
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Chapter:
Human Body
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