The passages that direct air into the lungs are called which structures?

The passages that direct air into the lungs are called which structures?

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

Answer: (A)

Air moves into the lungs through the bronchial tree, the main conducting passages of the lower airway. The trachea funnels air from the larynx down toward the lungs and then splits into two main tubes called bronchi, one entering each lung. These bronchi carry air deeper into the lungs and branch into smaller passages until it reaches the alveoli, where gas exchange occurs. The larynx sits above and functions in voice and airway protection, not as the direct conduit into the lungs. The alveoli are tiny sacs for gas exchange, not conduits. So the passages that direct air into the lungs are the bronchi.

Air moves into the lungs through the bronchial tree, the main conducting passages of the lower airway. The trachea funnels air from the larynx down toward the lungs and then splits into two main tubes called bronchi, one entering each lung. These bronchi carry air deeper into the lungs and branch into smaller passages until it reaches the alveoli, where gas exchange occurs. The larynx sits above and functions in voice and airway protection, not as the direct conduit into the lungs. The alveoli are tiny sacs for gas exchange, not conduits. So the passages that direct air into the lungs are the bronchi.