Question

describe double circulation of blood in human beings. why it is necessary?​

Answer 1

Answer:

This means that during a single cycle, the blood goes twice in the heart. ... This double circulatory system is important because it ensures provision of oxygenated blood to the muscle and not a mixture of oxygenated and de-oxygenated blood. Hence, this system ensures efficient supply of oxygenated blood to the muscles.

Answer 2

Answer:

double circulation :

Explanation:

it is a type of circulation system in which the blood makes two distinct circuits. The oxygenated blood from the lungs returns to the heart , which is pumped again into different parts of the body by the heart.