| | Conditions & Treatments | Digestive Health Which sphincter separates the stomach from small intestines? The sphincter that regulates and separates the stomach and small intestine is called the pyloric sphincter or the pyloric valve. Digestive Health - Related Articles Worms That Live in Humans Male Yeast Infections Is the liver involved in digestion? What Are the Causes of a Long Redundant Colon? Side Effects of Polyethylene Glycol Overactive Colon Symptoms Oral Use of Sodium Bicarbonate