Question

Q3. Why is it necessary to separate oxygenated blood in mammals and
birds?

Answer 1

Answer:

. It is necessary in mammals and birds to separate oxygenated and de-oxygenated blood because this makes their circulatory system is more efficient and helps in maintaining constant body temperature.

Explanation:

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Answer 2

it is important because if deoxygenated is carried to different part it can be dangerous and oxygenated blood can be expelled. as the mixed will be carried every where and hence, it can be dangerous.