Question

why should oxygenated blood and deoxygenated blood be separated?

Answer 1

Answer:

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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.

Answer 2

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it is necessary to separate oxygenated and deoxygenated blood because this make their circulatory system more efficient and helps in maintaining content body temperature.