Lower airway consists of which structure?

Lower airway consists of which structure?

• A. Trachea
• B. Nasopharynx
• C. Pharynx
• D. Larynx

Answer: (A)

Distinguishing upper from lower airway by location relative to the larynx. The lower airway consists of the passages below the larynx that carry air into the lungs, with the trachea acting as the main conduit from the larynx into the bronchi. That makes the trachea part of the lower airway. The other structures are located above the larynx and are considered upper airway components: the nasopharynx and pharynx lie in the throat region, and the larynx sits at the top of the trachea and is typically grouped with the upper airway due to its roles in voice and airway protection.

Distinguishing upper from lower airway by location relative to the larynx. The lower airway consists of the passages below the larynx that carry air into the lungs, with the trachea acting as the main conduit from the larynx into the bronchi. That makes the trachea part of the lower airway. The other structures are located above the larynx and are considered upper airway components: the nasopharynx and pharynx lie in the throat region, and the larynx sits at the top of the trachea and is typically grouped with the upper airway due to its roles in voice and airway protection.