describe the double circulation in human body.why is it necessary ?
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During a single cycle bloodgoes twice in the heart which is known as double circulation. It isnecessary in human being to separate oxygenated and de-oxygenated blood because this makes their circulatory system is more efficient and helps in maintaining constant bodytemperature.
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Double circulation : A circulatory system in which blood makes two distinct circuits. It means blood travels two times 2 complete one circulation.
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