Which structure branches from secondary bronchi?

Which structure branches from secondary bronchi?

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

Answer: (D)

Understanding how the bronchial tree is organized helps interpret this. The trachea splits into primary bronchi, which then divide into secondary (lobar) bronchi. The next level after secondary bronchi is the tertiary (segmental) bronchi. From there, smaller passages called bronchioles branch off, with terminal bronchioles leading to respiratory bronchioles and ultimately to alveoli where gas exchange occurs. So the structure that branches from secondary bronchi is the tertiary bronchi; bronchioles come after that level. Alveoli are the gas-exchange sacs at the end, and the trachea is the main airway above the bronchial tree.

Understanding how the bronchial tree is organized helps interpret this. The trachea splits into primary bronchi, which then divide into secondary (lobar) bronchi. The next level after secondary bronchi is the tertiary (segmental) bronchi. From there, smaller passages called bronchioles branch off, with terminal bronchioles leading to respiratory bronchioles and ultimately to alveoli where gas exchange occurs. So the structure that branches from secondary bronchi is the tertiary bronchi; bronchioles come after that level. Alveoli are the gas-exchange sacs at the end, and the trachea is the main airway above the bronchial tree.