Question

in mammals and birds why is it necessary to separate oxygen and de oxygenated blood​

Answer 1

Answer:

idk about birds but

Explanation:

They must separate oxygenated and de-oxygenated blood so that their circulatory system is more efficient and can maintain their constant body temperature. It is also better if the oxygenated blood stays separate, as its combination with deoxygenated blood will impure the entire blood.