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31 July, 01:29

Describe the body's first lines of defence: (not including the immune system)

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  1. 31 July, 05:24
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    physical and chemical.

    Explanation:

    The first line of defence includes

    1. Physical eg: nails

    2. chemical : that are always ready and prepared to defend the body from infection.

    These include your skin, tears, mucus, cilia, stomach acid, urine flow,

    friendly bacteria
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