Question

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

Answer 1

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It is necessary to separate the oxygenated and deoxygenated blood because the oxygenated blood is purified blood which is helpful for the body and the organism while the deoxygenated blood is not purified and so it is harmful to the body and the organism in mammals and the birds ...............

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 .