title: Development of the embryonic chicken thymus. II. Differentiation of the epithelial cells studied by electron microscopy.
mesh_terms: D000367:Age Factors; D000818:Animals; D002454:Cell Differentiation; D002642:Chick Embryo; D004847:Epithelial Cells; D004848:Epithelium / Q000648:ultrastructure; D008854:Microscopy, Electron; D013601:T-Lymphocytes / Q000166:cytology / Q000276:immunology; D013950:Thymus Gland / Q000166:cytology / Q000196:embryology*; D014617:Vacuoles / Q000648:ultrastructure