title: Immunological defence mechanisms of the gastrointestinal tract.
mesh_terms: D000818:Animals; D001402:B-Lymphocytes / Q000276:immunology; D004064:Digestive System / Q000276:immunology*; D004847:Epithelial Cells; D004848:Epithelium / Q000276:immunology; D006801:Humans; D007111:Immunity, Cellular; D007136:Immunoglobulins / Q000096:biosynthesis; D007413:Intestinal Mucosa / Q000276:immunology; D007694:Killer Cells, Natural / Q000276:immunology; D008264:Macrophages / Q000276:immunology; D051379:Mice; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D007136:Immunoglobulins