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Human Health and Diseases. — Bio Zoology STD 12 — Question

Tamilnadu BoardEnglish MediumSTD 12Bio ZoologyHuman Health and Diseases.2 Marks
Question
How skin and mucus membrane act as barriers for infections?
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Answer

Skin prevents the entry of microbes. Its acidic environment (pH 3-5) retards the growth of microbes.

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