Question

Describe double carculation in human beings
is necessary, why it is necessory?​

Answer 1

Answer:

Mammals have a double circulatory system. This means that during a single cycle, the blood goes twice in the heart. There are two loops in which blood is circulated. One loop is oxygenated and the other is de-oxygenated. 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:

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

Explanation:

Hope it helps!!!