Question

what is double circulation water is advantages

Answer 1

Human circulation is called double circulation because humans have a double circulatory system which comprises two separate circuits to pump blood through heart twice.

Answer 2

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.