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7 April, 00:54

Identify how the physical barriers of the immune system protect the body against pathogens

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  1. 7 April, 01:13
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    skin contains tightly packed cells

    skin is tough, flexible, and waterproof

    you cough when a pathogen enters your mouth

    you sneeze when a pathogen enters your nose
  2. 7 April, 03:28
    0
    The first physical barrier of the immune system is the skin. most pathogens are unable to pass through, unless thru a scratch or lesion.
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