The primary function of the hepatic portal vein is to deliver nutrient-rich blood from the intestines to which organ?

• A. The liver
• B. The heart
• C. The kidneys
• D. The lungs

Answer: (A)

Nutrient-rich blood from the intestines enters the hepatic portal vein and is carried directly to the liver. This portal route lets the liver process absorbed nutrients, store energy, regulate blood glucose, and detoxify substances before the blood joins the general circulation. The heart relies on systemic blood flow, the kidneys filter waste from blood, and the lungs handle gas exchange—none of which are the first destination for this portal blood.