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Explain the cause of circulatory in frog

User Anshul Patel
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1 Answer

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12 votes

Answer:

In the 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 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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User Drbunsen
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