Mae gan y corff dynol fwy na 100 triliynau o wahanol facteria, ac mae'r mwyafrif ohonynt yn y llwybr treulio.
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10 Ffeithiau Diddorol About The role of bacteria in the human body and the importance of probiotics

10 Ffeithiau Diddorol About The role of bacteria in the human body and the importance of probiotics