Question

all why is it essential to keep separate completely
and deoxygenated blood circulation
in mammals and birds?​

Answer 1

Answer:

As mammals and birds require to keep their body warm, they require a higher supply of oxygen. Thus, it is beneficial if the oxygenated blood remains separate as its mixing with deoxygenated blood can make the entire blood impure.

if u r satisfied with my answer please mark me brainliest

and stay home and stay safe.....