Question

In animals and mammals why is it necessary to separate oxygenated and de - oxygenated?

Answer 1

It is necessary in mammals 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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Answer 2

Separation of oxygenated and deoxygenated blood allows good supply of oxygen to the body . This system is useful in animals that have high energy requirement . Mammals and birds constantly need oxygen to get energy to maintain their body temperature constant .