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3 votes
Which is NOT a structure in the respiratory system?

A) lungs
B) Diaphragm
C) Trachea
D) Brain​

User Korsbo
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2 Answers

5 votes
B diaphragm
I’m pretty sure!!:)
User Gbabu
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7 votes
b. diaphragm
hope this helps!
User John Wooten
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