Biology, asked by av5109804, 10 months ago

what is double circulatoin and why it is necessary?

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Answered by tuka81

1

Ans. During a single cycle blood goes twice in the heart which is known as double circulation. It is necessary in human being to separate oxygenated and de-oxygenated blood because this makes their circulatory system is more efficient and helps in maintaining constant body temperature. please mark me as brainliest

Answered by shreya9960

4

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