Question

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

Answer 1

It is important to do that as it provides more energy to the organisam,which is absent in the rest of the organisams

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Answer 2

Answer:

yes it is necessary

Explanation:

it is necessary to separate oxygenated and deoxygenated blood in mammals and birds because it provides more energy for them so that they could use energy constantly