As air moves down through the tracheobronchial tree, the FIRST segment that will contain alveoli will be
A) terminal bronchioles.
B) alvolar duct.
C) alveolar sac.
D) bronchioles.
E) respiratory bronchioles.

Question

Quizplus · Accepted Answer

Respiratory bronchioles are the first segment of the tracheobronchial tree where alveoli appear, marking the transition from the conducting zone to the respiratory zone.

As Air Moves Down Through the Tracheobronchial Tree, the FIRST