Question

Why double circulation is necessary in humans and birds?

Answer 1

heya mate.....

Answer:

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

hope it helps u ❤️

Answer 2

Answer:

Explanation:

→ Double circulation system deliver greater blood flow rate to tissues around the body. The metabolic rate of mammals and birds is higher as compared to that of fishes. Hence in order to continue their life processes they need chemical substances more frequently which is transferred by blood.