Why it is necessary to separate oxygenated and deoxygenated blood by mammals and birds?

• The circulatory system in birds and mammals have a double circulation system where the oxygenated, as well as deoxygenated blood, remains separated. 
• This is essential so as to maintain the body temperature efficiently over a wide range. 
• Mammals and birds require a higher supply of oxygen for more cellular respiration so that they can produce more energy to maintain their body temperature.
• It is also better if the oxygenated blood stays separate, as its combination with deoxygenated blood will make the entire blood impure.

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Updated on: 27-Mar-2023

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