Biology, 20.07.2021 20:00, kimho2324

Omplete the passage to describe the function of the heart. The pumping of the heart involves the alternate contraction and relaxation of the chambers of the heart. The upper chambers of the heart are called
, and the lower chambers of the heart are called
.

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Omplete the passage to describe the function of the heart. The pumping of the heart involves the al...