M cells: portals to the mucosal immune system.
Featherstone
C
C
D000818:Animals; D006801:Humans; D018928:Immunity, Mucosal / Q000276:immunology*; D007114:Immunization; D007413:Intestinal Mucosa / Q000166:cytology* / Q000276:immunology; D051379:Mice; D010581:Peyer's Patches / Q000166:cytology* / Q000276:immunology