This body region is protected by fatty acids,acidic pH,lactic acid,and a tough cell barrier with its own normal biota:

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The skin is the body region that is protected by fatty acids, acidic pH, lactic acid, and a tough cell barrier with its own normal biota. The skin's normal flora helps to prevent the overgrowth of potentially harmful microorganisms. Additionally, the skin's acidic pH, fatty acids, and lactic acid make it difficult for many pathogens to survive and grow on the skin.

This Body Region Is Protected by Fatty Acids,acidic PH,lactic Acid,and