Which sphincter separates the small and large intestine?

Which sphincter separates the small and large intestine?

• A. Ileocecal valve
• B. Pyloric sphincter
• C. Sphincter of Oddi
• D. Cardiac sphincter

Answer: (A)

The question is testing your knowledge of the junction between the small and large intestine and the valve that regulates passage between them. The ileocecal valve sits at the junction of the ileum and the cecum. It opens to let chyme move from the small intestine into the large intestine and closes to prevent backflow from the large intestine into the ileum. This regulation helps control transit and protects the ileum from colonic contents. The other structures are located elsewhere: the pyloric sphincter controls passage from the stomach into the duodenum; the Sphincter of Oddi governs the flow of bile and pancreatic juice into the duodenum; and the cardiac (lower esophageal) sphincter prevents stomach contents from refluxing into the esophagus.

The question is testing your knowledge of the junction between the small and large intestine and the valve that regulates passage between them. The ileocecal valve sits at the junction of the ileum and the cecum. It opens to let chyme move from the small intestine into the large intestine and closes to prevent backflow from the large intestine into the ileum. This regulation helps control transit and protects the ileum from colonic contents.

The other structures are located elsewhere: the pyloric sphincter controls passage from the stomach into the duodenum; the Sphincter of Oddi governs the flow of bile and pancreatic juice into the duodenum; and the cardiac (lower esophageal) sphincter prevents stomach contents from refluxing into the esophagus.