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The ____ protects the body from foreign substances and cells.

A. Endocrine system
B. Immune system
C. Urinary system
D. Respiratory system

User Jobincs
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2 Answers

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The answer would be choice B (immune system)
User Rafay Hassan
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b. Immune System

because the Immune System filters out foreign substances and harmful bacteria.

User MDragon
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