Histology of the Large and Medium Sized Airways Airways are lined by a pseudostratified ciliated columnar epithelium interspersed with mucus secreting goblet cells Ashley Davidoff TheCommonVein.netAs the medium sized airways progress to to the small airways they lose many of the goblet cells, become a simple epithelium and remain ciliated Ashley Davidoff TheCommonVein.netAs the terminal bronchial transitions to the respiratory bronchial the mucosa becomes non ciliated and cuboidal Ashley Davidoff TheCommonVein.netAt the level of the mebranous airways (respiratory bronchiole, alveolar duct, alveolar sac and alveoli, the mucosa becomes mostly a simple squamous epithelium Ashley Davidoff TheCommonVein.net
