Which two veins converge to form the main portal vein?

Study liver anatomy and function with our medical students test. Engage with detailed multiple choice questions, each with hints and explanations. Prepare effectively for your test!

The main concept is how the hepatic portal system is formed. The main portal vein is created where two major veins coming from the gut and spleen merge behind the neck of the pancreas: the splenic vein and the superior mesenteric vein. This union sends nutrient-rich blood from the gastrointestinal tract and spleen toward the liver for processing. The inferior mesenteric vein usually drains into the splenic vein or the portal system but does not form the portal vein with the splenic vein. The left gastric vein also feeds the portal system but is not what combines to create the main portal vein. Once formed, the portal vein ascends to the porta hepatis and divides within the liver to supply the hepatic parenchyma.