[Blood-brain barrier: electron microscopic study].
D000818:Animals; D001692:Biological Transport; D001812:Blood-Brain Barrier; D001921:Brain / Q000378:metabolism; D002463:Cell Membrane Permeability; D004848:Epithelium / Q000378:metabolism; D006168:Guinea Pigs; D008833:Microcirculation; D008854:Microscopy, Electron; D051381:Rats