Question

Define the double circulation of blood . Why is it necessary?​

Answer 1

Answer:

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Explanation:

Double circulation is a process during which blood passes twice through the heart during one complete cycle. This type of circulation is found 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.

The separation of oxygenated and deoxygenated blood allows a more efficient supply of oxygen to the body cells. Blood is circulated to the body tissues through systemic circulation and to the lungs through pulmonary circulation.

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