The trachea and all of the respiratory passages are collectively called the ____________________.
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Q169: The alveoli and the pulmonary capillaries are
Q170: The right primary bronchus branches into _
Q171: The function of the serous fluid of
Q172: The bronchioles differ from the bronchi in
Q173: The diaphragm is made of _ muscle,
Q175: The diaphragm _ during inhalation and moves
Q176: Pulmonary surfactant permits normal inhalation because it
Q177: During inhalation, the chest cavity is expanded
Q178: All of the structures and substances through
Q179: The bronchioles can constrict or dilate because
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