What is this?

Study for the CAMLPR Histology Practice Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

What is this?

Bronchioles are the small airways that come after the bronchi and before the alveoli. They are identified by a wall that lacks cartilage and mucous glands, with a relatively prominent smooth muscle layer and a lining of simple ciliated epithelium (often simple cuboidal) and club cells. This combination—no cartilage rings or glands, plus a smooth muscle–rich wall and a simple epithelium—sets bronchioles apart from the trachea (which has cartilage rings and goblet cells) and from the larger bronchi (which also have cartilage). Alveoli, on the other hand, are tiny air sacs with very thin walls designed for gas exchange, not tubular airways. So the depicted structure fits bronchioles.

Bronchioles are the small airways that come after the bronchi and before the alveoli. They are identified by a wall that lacks cartilage and mucous glands, with a relatively prominent smooth muscle layer and a lining of simple ciliated epithelium (often simple cuboidal) and club cells. This combination—no cartilage rings or glands, plus a smooth muscle–rich wall and a simple epithelium—sets bronchioles apart from the trachea (which has cartilage rings and goblet cells) and from the larger bronchi (which also have cartilage). Alveoli, on the other hand, are tiny air sacs with very thin walls designed for gas exchange, not tubular airways. So the depicted structure fits bronchioles.

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