Question

what are the advantages of separate channals in mammals and birds for oxygenated and deoxygenated blood ?

Answer 1

It is necessary because mammals and birds are warm blooded. Mixing of theses two will decrease the efficency of blood to carry oxygen and our organs won't be able to work properly. Also ,mammals and birds need to maintain their body temperature (warm blooded) . Mixing of deoxygenated and oxygenated blood will increase their body temperature as the level of carbon dioxide will rise in blood. 

Answer 2

Answer:

• Oxygenated blood will carry oxygen while deoxygenated blood will carry carbon dioxide.
• Mixing of these will make the internal environment acidic and there will become more CO2 concentration that will cause harmful effect to the kidney and lungs because when cleaned by nephrons in kidneys is given to lungs for oxygenation and thus continues the cycle.
• So, the system called double circulation comes to rescue where blood flows through heart two times that is once when it is oxygenated and when once it is deoxygenated.