Question

what is it necessary to separate oxygenated and deoxygenated blood in mammles and birds

Answer 1

It is necessary because mammals and birds are worm blooded. Mixing of theses two will decrease the efficiency of blood to carry oxgen and our organs won't be able to work properly. Also mammals and birds need to maintain their body temperature as the level of carbon dioxide will rise in blood. Mammals and birds have high energy requirements. Mixing of deoxgenated and oxygenated blood will decrease their stamina.

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.