Answer :
Final answer:
The duodenal ampulla, also known as hepatopancreatic ampulla or ampulla of Vater, is a structure where the bile duct carrying bile from liver and the pancreatic duct carrying pancreatic juice from pancreas converge. This ampulla opens into the duodenum of small intestine. The flow of both bile and pancreatic juice from the ampulla into the duodenum is controlled by the hepatopancreatic sphincter.
Explanation:
The term 'duodenal ampulla,' also referred to as the hepatopancreatic ampulla or ampulla of Vater, best matches description 1) where pancreatic juice and bile enter the duodenum. The duodenal ampulla marks the transition from the anterior portion of the alimentary canal to the mid-region. It is the point of convergence for the bile duct (through which bile passes from the liver) and the main pancreatic duct (through which pancreatic juice passes from the pancreas). This ampulla opens into the duodenum at a tiny volcano-shaped structure called the major duodenal papilla. The hepatopancreatic sphincter (sphincter of Oddi) regulates the flow of both bile and pancreatic juice from the ampulla into the duodenum.
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