part_of part of part of develops from contributes to morphology of lung epithelium A pseudostratified epithelium, containing basal cells, stem cells of the airway, submucosal glands and cartilage rings, is limited to the trachea and large lobar airways in the mouse (Morrisey and Hogan, 2010). This more complex epithelium extends to terminal bronchioles in the human[DOI:10.1242/dev.115469] epithelium foregut lung lower respiratory tract epithelium