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18-05-2017
Biology

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What are the five main barriers to block pathogens? *?

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DeathByNoodles DeathByNoodles

18-05-2017

There is external and internal so I'll list th external. The most important is skin then mucus, sweat or secretion, hair, nails and tears which are all part of the integumentary. Some internal defenses are white blood cells and T cells.

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