Question

11. Describe double circulation in human beings. Why is it necessary?​

Answer 1

Answer:

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.

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Explanation:

Answer 2

Answer:

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 deoxygenated blood because this makes their circulatory system more efficient and helps in making constant body temperature.

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