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Welcome to the Living world: Immunity and Immune system

Short Essay on ‘Immunity’ (722 Words)

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Short Essay on ‘Immunity’ (722 Words)! Micro-organisms are ubiquitous. They are in the air we breathe and in/on the food we eat. Thus our epithelial surfaces (skin, respiratory tract, gastro-intestinal tract, genitourinary tract) are continuously exposed to microorganisms. Disease occurs when micro organisms invade epithelial surfaces. (more…)

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