Microbes - What Are They And What Are The Facts? - Children's 4th Grade Science Book

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Microbes are tiny organisms. They are found in every corner of the earth. Some of them are harmful, others are beneficial. A few of them can even cause disease. But these organisms have an important role in the lives of humans. It is estimated that there are trillions of microbes in the human body. These organisms play a crucial role in digestion, immune system regulation, and cognition. The relationship between humans and microbes begins at birth.