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HOw are the two different?
hey sup.. dis is lyk my 1st post.. hope it helps. dis is my info on chemical barriers and body secretions Chemical Barriers- stomach is highly acidic which kills most pathogens that are swallowed with food, or in mucus. Urinary and reproductive openings are mildly acidic, enough to inhibit the...- PakMaN1212
- Post #10
- Forum: Search for Better Health
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