Poal vein is formed by union of which of the following veins?

Poal vein is formed by the union of Superior mesenteric vein (SMV) and splenic vein posterior to the neck of pancreas. The inferior mesenteric vein drains into the splenic vein. The hepatic poal vein pass posterior to the first pa of duodenum, in the free edge of lesser omentum. At the poa hepatis, it divides into right and left branches supplying the right and left lobes of the liver. Within the sinusoids of the liver, hepatic poal blood and oxygenated blood from the hepatic aery mix together and come into contact with the hepatocytes, where metabolites such as products of digestion are exchanged. Blood from the sinusoids empties into hepatic veins draining the liver and in turn drain into IVC, and blood is returned to hea.