Question

The only structure that attach directly to the lungs is ?

a. trachea.
b. bronchi.
c. bronchioles.
d. terminal bronchioles.​

Answer 1

The correct answer is d. terminal bronchioles.

Terminal bronchioles are the smallest air passages in the lungs and are responsible for delivering air directly to the respiratory bronchioles, where gas exchange occurs. The trachea, bronchi, and bronchioles are all part of the airway system that leads to the lungs but they do not directly attach to the lungs.