Question

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

Answer 1

Answer:

t is necessary in mammals and birds to separate oxygenated and de-oxygenated blood because this makes their circulatory system is more efficient and helps in maintaining constant body temperature.

Explanation:

Answer 2

Answer:

because they have a routine of co2 and o2 inhalation and exhalation if both are mixed they caused more difficult problems

and they are warm blooded so by this maintenance the body temperature