title: Introduction.
authors.affiliation: Department of Anatomy, Oita Medical University, Oita 879-5593, Japan.
authors.forename: Seiji
authors.initials: S
authors.lastname: Kato
mesh_terms: D000818:Animals; D006651:Histocytochemistry; D006801:Humans; D008208:Lymphatic System / Q000648:ultrastructure*; D008854:Microscopy, Electron; D014070:Tooth / Q000098:blood supply / Q000648:ultrastructure