title: [The immunologic system of the gastrointestinal tract].
mesh_terms: D000818:Animals; D004848:Epithelium / Q000276:immunology; D006801:Humans; D007070:Immunoglobulin A / Q000276:immunology*; D007071:Immunoglobulin A, Secretory / Q000276:immunology* / Q000378:metabolism; D007422:Intestines / Q000276:immunology*; D008214:Lymphocytes / Q000166:cytology / Q000276:immunology*; D008221:Lymphoid Tissue / Q000276:immunology*; D010581:Peyer's Patches / Q000166:cytology / Q000276:immunology*; D013552:Swine; D013950:Thymus Gland / Q000276:immunology
chemical_list: D007070:Immunoglobulin A; D007071:Immunoglobulin A, Secretory