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

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

Answer: (B)

The main idea is how air is directed into the lungs. After air passes the upper airway, it travels down the trachea and then splits into two main tubes that enter each lung. These are the bronchi, the primary passageways that carry air from the trachea into the lungs and then branch into smaller airways. From there, air moves through progressively smaller passages (bronchioles) to reach the alveoli where gas exchange occurs.

Pharynx is a common passage for air and food, the larynx acts as the voice box and a gateway to the lower airway, and the trachea is the main conduit toward the lungs. But the specific structures that direct air into each lung are the bronchi.