Question

Blood circulation in human is also called double circulation

Answer 1

As when we breathe the fresh air we inhale gives oxygen to the body and when the heart pumps the blood Back from the all parts of the body that time the blood is sent to the heart for oxygenating the deoxygenated blood and from lungs it is sent to heart.

And this double circulation of blood from heart to lung and from lungs ti heart is know as double circulation..

Answer 2

because it is a circulation of blood in which the blood passes twice through heart it includes systemic circulation and pulmonary circulation through which we can maintain our constant body temperature and hence called as warm blooded organism

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