Brunner's glands.
D000818:Animals; D002011:Brunner Glands / Q000033:anatomy & histology / Q000378:metabolism* / Q000502:physiology; D004386:Duodenum / Q000378:metabolism*; D004573:Electrolytes / Q000378:metabolism; D004798:Enzymes / Q000378:metabolism; D005502:Food; D005768:Gastrointestinal Hormones / Q000502:physiology; D005769:Gastrointestinal Motility; D006801:Humans; D007413:Intestinal Mucosa / Q000502:physiology
D004573:Electrolytes; D004798:Enzymes; D005768:Gastrointestinal Hormones