This video has been downloaded by your browser as a separate file.
The two upper visceral arteries, the celiac trunk and superior mesenteric artery (SMA), arise just below the crura of the diaphragm at the level of the disks above and below L1. The celiac trunk usually (85%) gives rise to three vessels. The arteries bracket the body of the pancreas. The splenic and superior mesenteric veins converge to form the portal vein beneath the neck of the pancreas. The inferior mesenteric vein usually joins the splenic to the left of the fourth portion of the duodenum.
The body and tail of the pancreas cross diagonally from lower right to upper left behind the body of the stomach deep to the posterior peritoneum of the lesser sac. The posterior wall of the stomach forms the anterior boundary of the lesser sac.
The stomach has a robust arterial supply from four sources: the right gastric off the hepatic, the right gastroepiploic off the gastroduodenal, the left gastric off the celiac trunk, and the short gastrics and left gastroepiploic off the splenic artery These vessels form anastomosing arcades along the lesser and greater curves.