BiggestBoyBrain BiggestBoyBrain

01-03-2020
Geography

contestada

which statement describes many of the structures involved in the first line of defense of the immune system
sorry not geography lol

Respuesta :

masterdestroyer27 masterdestroyer27

01-03-2020

Answer: physical and chemical barriers

Explanation:

physical and chemical barriers try to prevent pathogens from getting inside the body

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Ashleydarkwolfa Ashleydarkwolfa

25-09-2020

Answer: They have contact with the external environment.

(I took a test over this and got this question right)

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