ileocecal valve UMLS:C0020880 SCTID:362153007 The ileocecal valve is a sphincter muscle situated at the junction of the small intestine (ileum) and the large intestine. Its critical function is to limit the reflux of colonic contents into the ileum. Wikipedia:Ileocecal_valve galen:IleocecalValve FMA:15973 MESH:D007080 valva ileocaecalis (valva ilealis) NCIT:C13066 valve gastrointestinal sphincter