During pulmonary ventilation, relaxation of the diaphragm and external intercostals ________ and air flows out of the lungs.

A. stimulates the phrenic nerve
B. expands the rib cage
C. increases the volume of the thoracic cavity
D. flattens the floor of the thoracic cavity
E. increases the pressure in the thoracic cavity


Answer: E

Anatomy & Physiology

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