Answer :
Final answer:
The main pancreatic duct and the accessory duct carry pancreatic juice from the pancreas to the duodenum. They are formed by the exocrine part of the pancreas. The main pancreatic duct merges with the common bile duct to enter the duodenum via the hepatopancreatic ampulla, while the accessory duct enters directly.
Explanation:
The ducts that carry pancreatic juice and drain into the duodenum through the head of the pancreas are the main pancreatic duct (also known as the duct of Wirsung) and the accessory duct (duct of Santorini). These ducts are primarily formed by the exocrine part of the pancreas, which consists of acini (grape-like cell clusters). The acinar cells secrete enzyme-rich pancreatic juice into tiny merging ducts that form the two main ducts.
The main pancreatic duct merges with the common bile duct to enter the duodenum through a common opening called the hepatopancreatic ampulla. The smooth muscle sphincter of the hepatopancreatic ampulla controls the release of pancreatic juice and bile into the small intestine. The accessory duct, when present, runs from the pancreas directly into the duodenum, approximately 1 inch above the hepatopancreatic ampulla.
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