Question

please explain about double circulation.

Answer 1

The blood flows twice in heart in a cycle , It is known as double circulation

Answer 2

the majority of mammels (including humans) utilize a double circulatery system.this means we have two loops in our body in which blood circulates.one is oxygenated meaning,oxygen rich,and other is deoxygenated, which means it has little to no oxygen,but a lot of carbon dioxide.