Endocrine Phys

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Innate defenses(first line of defense, surface barrier

Last updated 1:07 AM on 3/13/25

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1

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Tight Junctions

keep bacteria from entering between cells

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Keratin

Make skin tough

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Sebum

slightly acidic denters growth of most pathogenic organisms

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Mucus

In nasal passages and bronchi trap pathogens and other debris

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Hydrochloric acid

in stomach destroyed ingested pathogens

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Normal Flora

of the skin, mouth, and gut, are good bacteria which provide competition for bad bacteria