The lower airway consists of which structures?

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Multiple Choice

The lower airway consists of which structures?

Lower airway refers to the air passages from the trachea onward into the lungs where gas exchange occurs. The trachea is the main conduit that splits into the bronchi and smaller airways inside the lung tissue, down to the alveoli. The lungs contain these airways and serve as the site of gas exchange, whereas the upper airway (nose, mouth, pharynx, larynx) handles filtration and warming of air before it reaches the lower airway. The diaphragm and intercostal muscles are muscles of respiration, not part of the airway. So the structures that define the lower airway are the trachea and the lungs.

Lower airway refers to the air passages from the trachea onward into the lungs where gas exchange occurs. The trachea is the main conduit that splits into the bronchi and smaller airways inside the lung tissue, down to the alveoli. The lungs contain these airways and serve as the site of gas exchange, whereas the upper airway (nose, mouth, pharynx, larynx) handles filtration and warming of air before it reaches the lower airway. The diaphragm and intercostal muscles are muscles of respiration, not part of the airway. So the structures that define the lower airway are the trachea and the lungs.

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