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Biology 17 Online
OpenStudy (anonymous):

The _______ is a muscle in the bottom of the chest that bends downward to draw air in, and bows upward to force air out of the lungs. A. diaphram B. bronchi C. trachea D. heart

OpenStudy (anonymous):

I think its C, is that correct @shrutipande9

OpenStudy (anonymous):

A. diaphram is right.

OpenStudy (anonymous):

yeah im pretty sureit is A

OpenStudy (shrutipande9):

Yes it is d diaphragm. ..sry I dozed off yest

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