Question

why it is necessary to separate oxygenate and deoxygenated blood in mammal and bird?

Answer 1

it is necessary to separate oxygenated and deoxygenated blood in mammals and birds because birds and mammals have very high energy need,they use energy constantly to maintain their body temperature ...so oxygenated and deoxygenated blood need to be separated to get a highly efficient supply of oxygen...

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.