title: The myth of the mucus barrier.
mesh_terms: D000818:Animals; D001639:Bicarbonates / Q000502:physiology; D005753:Gastric Mucosa / Q000502:physiology* / Q000648:ultrastructure; D006863:Hydrogen-Ion Concentration; D008855:Microscopy, Electron, Scanning; D009093:Mucus / Q000502:physiology*; D051381:Rats
chemical_list: D001639:Bicarbonates