title: Human vermiform appendix. Immunocompetent cell topography and cell-to-cell interactions in situ.
mesh_terms: D001064:Appendicitis / Q000473:pathology; D001065:Appendix / Q000276:immunology*; D001402:B-Lymphocytes / Q000648:ultrastructure; D005455:Fluorescent Antibody Technique; D006801:Humans; D007111:Immunity, Cellular; D008264:Macrophages / Q000648:ultrastructure; D013601:T-Lymphocytes / Q000648:ultrastructure