Question

what do you meant by double circulation? Explain ​

Answer 1

Answer:

Blood goes only once through the heart in the fish during one cycle. On the other hand, it goes through the heart twice during each cycle in vertebrates. This is called double circulation.

Answer 2

Answer:

flow of blood twice to the heart is called double circulation

Explanation:

pulmonary circulation :

*flow of blood from heart to lungs and back to heart

systematic circulation :

flow of blood from heart to other parts of the body (except lungs) but to heart