hey guyz what do u mean by double circulation?.??
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During a single cycle blood goes twice in the heart which is known as double circulation. It is necessary in human being to separate oxygenated and de-oxygenated blood because this makes their circulatory system is more efficient and helps in maintaining constant body temperature.
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The flow of blood through the heart twice, is termed as double circulation it consists of oxygenated nd deoxygenated blood .
hope it doesn't helps you
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