title: [Age-related ultrastructural changes in the gingiva of rats (author's transl)].
mesh_terms: D000375:Aging; D000818:Animals; D003094:Collagen; D003238:Connective Tissue / Q000648:ultrastructure; D004848:Epithelium / Q000648:ultrastructure; D005347:Fibroblasts / Q000166:cytology; D005881:Gingiva / Q000502:physiology / Q000648:ultrastructure*; D008297:Male; D009940:Organoids / Q000648:ultrastructure; D051381:Rats
chemical_list: D003094:Collagen