Final answer:
The pancreatic duct and common bile duct release their contents into the duodenum through the hepatopancreatic ampulla, regulated by the sphincter of Oddi.
Step-by-step explanation:
The pancreatic duct (the duct of Wirsung) and the common bile duct from the liver drain their contents into a specific section of the small intestine called the duodenum. The pancreatic duct carries enzyme-rich pancreatic juice from the exocrine part of the pancreas, while the common bile duct carries bile from the liver and gallbladder.
These ducts converge and release their contents through an opening called the hepatopancreatic ampulla, more commonly known as the ampulla of Vater, which is located in the duodenal wall. The flow of pancreatic juice and bile from this ampulla is regulated by the hepatopancreatic sphincter, also known as the sphincter of Oddi, into the duodenum.