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What body system assists the respiratory system by pulling the rib cage down to allow air to flow in? A. skeletal B. muscular C. endocrine D. circulatory
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What body system assists the respiratory system by pulling the rib cage down to allow air to flow in?

A. skeletal
B. muscular
C. endocrine
D. circulatory

User ReyCharles
by
8.2k points

1 Answer

7 votes
B. Muscular

It contracts and relaxes the diaphragm
User MichealAtmi
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