Why would be necessary to separate oxygenated and deoxygenated blood in mammals and birds?
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The energy requirements of mammals and birds are especially high. Moreover, both mammals and birds constantly use energy to maintain their body temperature. Oxygenated and deoxygenated blood needs to separated to allow sufficient flow of oxygen for maintaining body temperature and meeting their energy requirements.
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Explanation:
It is necessary to separate oxygenated and deoxygenated blood to maintain efficient supply of oxygen into the body. This system is essential in animals that have high energy need. For example, animals like mammals and birds which constantly use this energy to maintain their body temperature.
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