Question

what is the advanteges of double círculation system

Answer 1

Double circulation systems deliver greater blood flow rate to tissues around the body because the heart pumps the (oxygenated or 'oxygen-rich') blood returned to it from the lungs. This is useful because when blood passes through the lungs its pressure is reduced.

Answer 2

Double circulation is where both the oxygenated and deoxygenated blood circulate separately from each other.In lower vertebrates there is no such separation.

The amount oxygen carried would be much more and distinct in double circulation.

There is separate path for each of these blood types thereby preventing mixing of blood