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Question
The first line of defence in the immune system is provided by skin. Discuss.
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Solution
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The skin forms a physical barrier for the entry of microorganisms inside our body and thus, forms the first line of defence in the immune system.
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It also kills the microbes present on the surface of skin by secretions of oil and sweat glands.
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The skin forms a physical barrier for the entry of microorganisms inside our body and thus, forms the first line of defence in the immune system.
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It also kills the microbes present on the surface of skin by secretions of oil and sweat glands.
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