Question

Define double circulation ​

Answer 1

Answer:

Double circulation

The human circulatory system is a double circulatory system. It has two separate circuits and blood passes through the heart twice:

1. the pulmonary circuit is between the heart and lungs
2. the systemic circuit is between the heart and the other organs

Explanation:

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Answer 2

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Double circulation is a process during which blood passes twice through the heart during one complete cycle. This type of circulation is found in amphibians, reptiles, birds, and mammals. However, it is more prominent in birds and mammals as in them the heart is completely divided into four chambers – the right atrium, the right ventricle, the left atrium, and the left ventricle.