title: The gut as an immunological system.
mesh_terms: D000818:Animals; D000831:Animals, Newborn / Q000276:immunology; D000917:Antibody Formation; D000921:Antibody-Producing Cells; D000941:Antigens; D001402:B-Lymphocytes / Q000276:immunology; D018407:Bacterial Physiological Phenomena; D004064:Digestive System / Q000276:immunology* / Q000382:microbiology; D005260:Female; D006801:Humans; D007108:Immune Tolerance; D007111:Immunity, Cellular; D007070:Immunoglobulin A; D007413:Intestinal Mucosa / Q000276:immunology; D008099:Liver / Q000276:immunology; D008221:Lymphoid Tissue / Q000276:immunology; D010581:Peyer's Patches / Q000276:immunology; D011247:Pregnancy; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D000941:Antigens; D007070:Immunoglobulin A