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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
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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

User Milad Elyasi
by
8.8k points

1 Answer

2 votes
I think it is A. integumentary system.
User Roman Pfneudl
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8.4k points
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