Question

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

Answer 1

Answer:

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In birds and mammals have a double circulation system where both the oxygenated and deoxygenated blood maintains separate. ... They must 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

In birds and mammals have a double circulation system where both the oxygenated and deoxygenated blood maintains separate. They must separate oxygenated and de-oxygenated blood so that their circulatory system is more efficient and can maintain their constant body temperature.