Question

why is it necessary to separate oxygenated and deoxygenated blood in mammals and animals​

Answer 1

there is a need to seperate oxygenated and deoxygenated blood in mammals and animals because as they are warm blooded animals they are not able to tolerate mixing of blood ....,.....

........ I hope it will help you

Answer 2

Mammals and animals are warm blooded animal. They require large amount of energy for their survival. It is necessary to separate oxygenated and deoxygenated blood because this separation provides large amount of energy to regulate and maintain their life proceses.