Question

Why is it necessary to separate oxygenated and deoxygenated blood in
mammals and birds?
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Answer 1

Answer:

Answer: In birds and mammals have a double circulation system where both the oxygenated and deoxygenated blood maintains separate. ... It is necessary for them to separate oxygenated and de-oxygenated blood so that their circulatory system is more efficient and can maintain their constant body temperature

Explanation:

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Answer 2

Explanation:

It is necessary for them to separate oxygenated and de-oxygenated blood so that their circulatory system is more efficient and can maintain their constant body temperature.