Which structure conducts air between the larynx and the main bronchi?

Which structure conducts air between the larynx and the main bronchi?

• A. Bronchi
• B. Bronchioles
• C. Trachea
• D. Nasal cavity

Answer: (C)

Air is conducted from the larynx to the lungs by the trachea. This sturdy tube runs from just below the larynx down to where it splits into the right and left main bronchi, which then carry air into each lung. The nasal cavity is part of the upper airway where air enters and is conditioned, so it isn’t the conduit between the larynx and the main bronchi. Bronchi are the branches that come off the trachea to supply each lung, and bronchioles are smaller passages downstream; neither serves as the main conduit between the larynx and the main bronchi.

Air is conducted from the larynx to the lungs by the trachea. This sturdy tube runs from just below the larynx down to where it splits into the right and left main bronchi, which then carry air into each lung. The nasal cavity is part of the upper airway where air enters and is conditioned, so it isn’t the conduit between the larynx and the main bronchi. Bronchi are the branches that come off the trachea to supply each lung, and bronchioles are smaller passages downstream; neither serves as the main conduit between the larynx and the main bronchi.