Seudónimo Seudónimo

26-01-2017
Social Studies

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8. Which of the following body systems does the immune system rely on to provide the first line of defense against pathogens?
A. integumentary system
B. nervous system
C. circulatory system
D. endocrine system

Respuesta :

adorkablepanda adorkablepanda

26-01-2017

I think it is A. integumentary system.

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