Tag Archives: chromosome number

The Natural World of the Human Mouth

According to scientists, the number of species of microorganisms that permanently reside in the human oral cavity amounts to 200-500. Of those, only fifty are named and studied. They have various looks: balloons, ovoids, bacilli, those that look like corn on the cob, bottle brushes, spirals, zippers, etc. What of the inhabitants of the mouth are our enemies, and what are friends?

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