Which statement is true regarding 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 key idea is that the main portal vein carries nutrient-rich blood from the gut to the liver and reaches the liver through the porta hepatis, traveling in the hepatoduodenal ligament. It is formed behind the neck of the pancreas by the union of the splenic vein and the superior mesenteric vein (the inferior mesenteric vein drains into the splenic vein, not directly into the portal vein). As it ascends toward the liver, it lies within the hepatoduodenal ligament and enters the porta hepatis to ramify in the liver parenchyma.

This makes the true statement that it enters the porta hepatis through the hepatoduodenal ligament correct. The other statements are not accurate: the portal vein is not formed by the splenic and inferior mesenteric veins; in the hepatoduodenal ligament the portal vein lies posterior to the hepatic artery (not described as ascending on its posterior aspect), and the portal vein does not drain into the IVC (blood leaves the liver via the hepatic veins to the IVC).