Question

Why is it necccesaryto separate oxygenated and de oxygenated blood in mammals and birds?

Answer 1

every organism needs blood but of the blood is deoxygenated organisms cannot live.that is why we have a organ called heart for pumping the blood.

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.