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Describe double circulation in human beings. Why is it necessary?NCERT Class XScience - ScienceChapter_Life Processes |
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Answer» 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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