Which airway connects the larynx to the bronchi and is supported by cartilaginous rings that keep the airway open?

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

Answer: (D)

The trachea is the windpipe that bridges the larynx and the bronchi, and its walls are reinforced by C-shaped cartilaginous rings that keep the airway open during breathing. The open part of each ring faces the back to allow the esophagus to expand when you swallow, while the front provides rigidity so air can flow steadily down to the lungs. This design contrasts with the larynx above, which houses the vocal cords and helps protect the airway; the pharynx is the shared throat passage for air and food; and the alveoli are the tiny air sacs at the ends of the airway where gas exchange occurs, not a conducting airway. Keeping the trachea patent is essential in nursing care, as blockage or injury to this structure can be life-threatening and may require interventions to maintain airflow.