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Firlakuza [10]
3 years ago
10

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

Biology
1 answer:
tia_tia [17]3 years ago
7 0
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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