In the Bronchial Tree, Terminal Bronchioles Branch Directly Into

Question

In the bronchial tree, terminal bronchioles branch directly into
A)alveolar sacs.
B)respiratory bronchioles.
C)alveoli.
D)large bronchioles.
E)alveolar ducts.

Accepted Answer

Terminal bronchioles branch into respiratory bronchioles, which are the first structures in the respiratory zone where gas exchange occurs. Alveolar sacs and alveoli are part of the respiratory zone but are not directly branched from the terminal bronchioles. Large bronchioles and alveolar ducts do not exist in the bronchial tree.