1 — Hepatic portal vein; 2 — Superior mesenteric vein; 3 — Splenic vein; 4 — Pancreatic veins; 5 — Pancreaticoduodenal veins
1 — Hepatic portal vein; 2 — Superior mesenteric vein; 3 — Splenic vein; 4 — Pancreatic veins; 5 — Pancreaticoduodenal veins