Immunology of the gastrointestinal tract.
D000917:Antibody Formation; D004064:Digestive System / Q000276:immunology*; D006801:Humans; D007108:Immune Tolerance; D007136:Immunoglobulins / Q000096:biosynthesis; D007239:Infections / Q000276:immunology; D008214:Lymphocytes / Q000276:immunology; D010581:Peyer's Patches / Q000276:immunology
D007136:Immunoglobulins