best answer > How is the stomach a chemical barrier to invading pathogens 2024?- QuesHub | Better Than Quora
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  • Lucas Ross——Works at the International Development Association, Lives in Washington, D.C., USA.

    The first line of defence (or outside defence system) includes physical and chemical barriers 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 and white blood cells called neutrophils.Nov 2, 2010read more >>
    +119962023-06-21 02:29:31

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