why heart have the four chambers?
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The four-chambered heart has a distinct advantage over simpler structures: It allows us to send our "dirty" blood to the cleaners-the lungs-and our "clean" blood to the rest of the body without having to mix the two. That system is very efficient.
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the heart has four chambers
two atria and two ventricles
the right atrium receives oxygen-poor blood from the body and pumps it too the right ventricle
the right ventricle pumps the oxygen-poor blood to the lungs
the left atrium oxygen- rich blood from the lungs and pumps it too the left ventricle
hope it helps you
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