Normal bronchus (child)
This section of a large intrapulmonary bronchus shows pseudostratified columnar epithelium facing the lumen. The tela submucosa bronchiorum consists of a layer of loose connective tissue between the epithelium and the ring of cartilage and dense connective tissue at the periphery. Contained in the submucosa are smooth muscle, cartilage, and seromucous and mucous glands.
From the slide collection of the late Dr. Charles Kuhn