Biology, 30.06.2021 01:50, xxtonixwilsonxx

During pulmonary ventilation, relaxation of the diaphragm and external intercostals and air flows out of the lungs. increases the pressure in the thoracic cavity flattens the floor of the thoracic cavity increases the volume of the thoracic cavity expands the rib cage stimulates the phrenic nerve

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During pulmonary ventilation, relaxation of the diaphragm and external intercostals and air flows o...