title: Fine structural and enzyme histochemical observations on the respiratory epithelium of the caecilian lungs and gills. A contribution to the understanding of the evolution of the vertebrate respiratory epithelium.
mesh_terms: D000663:Amphibians / Q000033:anatomy & histology*; D000818:Animals; D005075:Biological Evolution; D004848:Epithelium / Q000648:ultrastructure; D005880:Gills / Q000648:ultrastructure*; D006651:Histocytochemistry; D007814:Larva / Q000033:anatomy & histology; D008168:Lung / Q000201:enzymology / Q000648:ultrastructure*; D008264:Macrophages / Q000648:ultrastructure; D008855:Microscopy, Electron, Scanning; D011650:Pulmonary Alveoli / Q000648:ultrastructure