Major duodenal papilla
|Major duodenal papilla|
|Interior of the descending portion of the duodenum, showing bile papilla.|
|The pancreatic duct.|
|Latin||papilla duodeni major|
The major duodenal papilla is an opening of the pancreatic duct into the duodenum. The major duodenal papilla is, in most people, the primary mechanism for the secretion of bile and other enzymes that facilitate digestion.
The major duodenal papilla is situated in the second part of the duodenum, 7-10 cm from the pylorus, at the level of the second or third lumbar vertebrae. It is surrounded by the sphincter of Oddi, and receives a mixture of pancreatic enzymes and bile from the Ampulla of Vater, which drains both the pancreatic duct and biliary system. 
The major duodenal papilla is occasionally found in the third part of the duodenum, the level of the vertebrae may be L2-3, and in about 10% of people, it may not receive bile. Additionally, in a small amount of people, the primary papilla for draining the pancreas may in fact be the accessory pancreatic duct. 
|This section requires expansion. (November 2013)|
This article uses anatomical terminology, for an overview see anatomical terminology.
- pancreas at The Anatomy Lesson by Wesley Norman (Georgetown University)
- digest-019 — Embryo Images at University of North Carolina
- Swiss embryology (from UL, UB, and UF) sdigestive/pankreas01