Question

Why oxygenated and deoxygenated blood do not mix in mammals and birds wrote the significance?

Answer 1

1) Mammals and birds have 4 chambered heart to avoid mixing of oxygenated and deoxygenated blood
2)This is useful in birds and mammals,which constantly use energy to maintain their body temprature in their enviornment
3)In animals who do not not need energy gor this purpose,the body temprature depends on the enviornment
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Answer 2

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.