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This is made up of you lungs, all airways connected with them, and muscles that help you breathe. A. Nervous System B. Endocrine System C. Circulatory System D. Respiratory System
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This is made up of you lungs, all airways connected with them, and muscles that help you breathe.

A. Nervous System


B. Endocrine System


C. Circulatory System


D. Respiratory System

User Meefte
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2 votes
The answer is d respiratory system
User Aric Lasry
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