I. Non-Specific Defense- General defense against any pathogen.
A. Skin
1. Almost Impenetrable
2. Sweat and Oils are highly acidic- kills most bacteria & fungi.
3. Normal flora- bacteria that live on the skin. They out compete pathogenic forms of bacteria.
B. Openings
1. Lysozymes- Enzymes that chemically destroy bacteria and fungi in tears and saliva.
2. Mucous Membranes- produce mucous in response to infection.
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