title: An ultrastructural study of the development of a surface-lining system in the avian lung.
mesh_terms: D000818:Animals; D001717:Birds; D001980:Bronchi / Q000166:cytology*; D002645:Chickens; D002479:Inclusion Bodies / Q000033:anatomy & histology; D008168:Lung / Q000166:cytology*; D008854:Microscopy, Electron; D012119:Respiration