the ileocecal valve (ileal papilla, ileocaecal valve, tulp's valve, tulpius valve, bauhin's valve, ileocecal eminence, valve of varolius or colic valve) is a sphincter muscle valve that separates the small intestine and the large intestine. its critical function is to limit the reflux of colonic contents into the ileum. approximately two liters of fluid enters the colon daily through the ileocecal valve.