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

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asked Oct 6, 2018 97.0k views

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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

Social Studies
middle-school

Milad Elyasi asked

by Milad Elyasi

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I think it is A. integumentary system.

Roman Pfneudl answered Oct 13, 2018

by Roman Pfneudl

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