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a. ciliated nasal membranes warm, moisten, and and filter inspired air.
b. Contraction of the diaphragm enlarges the thoracic cavity.
c. when the thoracic cavity enlarges, the pressure of air within the lungs falls.
d. when the pressure of air within the lungs is less than the atmospheric pressure, air will flow out of the lungs.
e. the respiratory process consists of inspiratory and expiratory acts following one another.
b. Contraction of the diaphragm enlarges the thoracic cavity.
c. when the thoracic cavity enlarges, the pressure of air within the lungs falls.
d. when the pressure of air within the lungs is less than the atmospheric pressure, air will flow out of the lungs.
e. the respiratory process consists of inspiratory and expiratory acts following one another.