Hepato-pancreatic junction: duodenum with plicae circularis (circular folds) | beginning of jejunum  |  splenic artery  |  celiac trunk | common hepatic artery |  proper hepatic artery | gastroduodenal artery |  superior mesenteric artery |  superior mesenteric vein |  colic artery  | opening of primary pancreatic duct (hepato-pancreatic sphincter)  | opening of accessory pancreatic duct  | | pancreas  |  primary (major) pancreatic duct  |  accessory (secondary) pancreatic duct  |  hepatic portal vein  |  common bile duct  |