Question

what do you mean by double circulation?​

Answer 1

Answer:

The human circulatory system is a double circulatory system. It has two separate circuits and blood passes through the heart twice: the pulmonary circuit is between the heart and lungs. the systemic circuit is between the heart and the other organs.

Explanation:

Answer 2

Answer:

The blood circulates twice through the heart for completing one round of circulation through out the body. This is called double circulation.