Opening in the duodenum for the entrance of the CBD

Opening in the duodenum for the entrance of the CBD

• A. Ampulla of Vater
• B. Sphincter of Oddi
• C. Pyloric Sphincter
• D. Minor Duodenal Papilla

Answer: (A)

The opening in the duodenum for the entrance of the common bile duct is the ampulla of Vater, also known as the major duodenal papilla. This is the site where the common bile duct and the main pancreatic duct join and drain their secretions into the duodenum. The ampulla is surrounded by the Sphincter of Oddi, which controls the flow of bile and pancreatic juice through this opening into the duodenum. The minor duodenal papilla is the opening for the accessory pancreatic duct, not the CBD, and the pyloric sphincter is located at the stomach–duodenum junction, not where the CBD enters.

The opening in the duodenum for the entrance of the common bile duct is the ampulla of Vater, also known as the major duodenal papilla. This is the site where the common bile duct and the main pancreatic duct join and drain their secretions into the duodenum. The ampulla is surrounded by the Sphincter of Oddi, which controls the flow of bile and pancreatic juice through this opening into the duodenum. The minor duodenal papilla is the opening for the accessory pancreatic duct, not the CBD, and the pyloric sphincter is located at the stomach–duodenum junction, not where the CBD enters.