1.

In mammals and birds why is it necessary to separate oxygenated and de-oxygenated blood ? How are they separated in the human heart?

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ANSWER:

In birds and MAMMALS have a double circulation system where both the oxygenated and deoxygenated blood maintains separate. ... It is necessary for them to separate oxygenated and de-oxygenated blood so that their CIRCULATORY system is more efficient and can maintain their constant BODY TEMPERATURE.



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