working mechanism of heart of frog
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In frog, Rana, venous blood is driven into the right atrium of the heart by contraction of the sinus venosus, and it flows into the left atrium from the lungs.
A contraction then spreads over the whole atrium and drives blood into the ventricle, where blood from the 2 sources tends to remain separate
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In the frog, venous blood is driven into the right atrium of the heart by contraction of the sinus venosus, and it flows into the left atrium from the lungs. A wave of contraction then spreads over the whole atrium and drives blood into the ventricle, where blood from the two sources tends to remain separate.
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