Question

Q5. Describe double circulation in human beings. Why is it necessary?​

Answer 1

Answer:

During a single cycle blood goes twice in the heart which is known as double circulation. It is necessary in human being to seperate oxygenated and de-oxygenated blood because this make their circulatory system is more efficient and helps in maintaining constant body temperature.

I hope it helps you.

Answer 2

Answer:

it is necessary to human beings to separate oxygenated and deoxygenated blood becoz this makes their circulatory system is more efficient and helps in maintaining constant body temperature