Terminal bronchiole
As bronchioles continue to decrease in diameter they transition to the smallest conducting bronchioles, called terminal bronchioles. Their simple cuboidal epithelium has reduced cilia and lacks goblet cells. Another secretory cell type, club cells, first appears in terminal bronchioles and continue into respiratory bronchioles. Club cells are not visible in this image. 400x
Terminal bronchiole
As bronchioles continue to decrease in diameter they transition to the smallest conducting bronchioles, called terminal bronchioles. Their simple cuboidal epithelium has reduced cilia and lacks goblet cells. Another secretory cell type, club cells, first appears in terminal bronchioles and continue into respiratory bronchioles. Club cells are not visible in this image. 400x
Epithelium
As bronchioles continue to decrease in diameter they transition to the smallest conducting bronchioles, called terminal bronchioles. Their simple cuboidal epithelium has reduced cilia and lacks goblet cells. Another secretory cell type, club cells, first appears in terminal bronchioles and continue into respiratory bronchioles. Club cells are not visible in this image. 400x
Alveoli
As bronchioles continue to decrease in diameter they transition to the smallest conducting bronchioles, called terminal bronchioles. Their simple cuboidal epithelium has reduced cilia and lacks goblet cells. Another secretory cell type, club cells, first appears in terminal bronchioles and continue into respiratory bronchioles. Club cells are not visible in this image. 400x