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Why is the circulation in man referred to as double circulation?
a. As the circulates twice through the in one complete cycle, it is called double circulation. In double circulation, oxygenated blood does not mix with deoxygenated blood.
b. The flow of oxygenated blood from the left ventricle to the various parts of the body and the return of deoxygenated blood to the right atrium is called the circulation.
c. The flow of deoxygenated blood from the right ventricle to the lungs and the return of oxygenated blood from the lungs to the left atrium is called the circulation.
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