There is a complex micro-ecosystem composed of about 1x1014 microbes in the human intestine, the number of which is more than 10 times that of the body's cells, including more than 1,000 kinds of anaerobic bacteria and aerobic bacteria.
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There is a complex micro-ecosystem composed of about 1x1014 microbes in the human intestine, the number of which is more than 10 times that of the body's cells, including more than 1,000 kinds of anaerobic bacteria and aerobic bacteria.