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Why is blood circulation in human heart called double circulation?​

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The blood circulation in human heart is called double blood circulation because blood passes twice through the heart in  one complete cycle of the body. Firstly, the right pump sends deoxygenated blood to the lungs where the blood becomes oxygenated and return back to the heart, where the blood is pumped again into different parts of the body.

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Ritika Jonwal

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