title: [Blood-brain barrier: study using light microscopy].
mesh_terms: D000818:Animals; D001812:Blood-Brain Barrier; D006801:Humans; D008751:Methylene Blue; D008853:Microscopy; D009457:Neuroglia / Q000098:blood supply / Q000166:cytology; D051381:Rats; D013194:Staining and Labeling
chemical_list: D008751:Methylene Blue