<P> The portal vein or hepatic portal vein is a blood vessel that carries blood from the gastrointestinal tract , gallbladder , pancreas and spleen to the liver . This blood is rich in nutrients that have been extracted from food , and the liver processes these nutrients ; it also filters toxins that may have been ingested with the food . 75 % of total liver blood flow is through the portal vein , with the remainder coming from the hepatic artery proper . The blood leaves the liver to the heart in the hepatic veins . </P>
<P> The portal vein or hepatic portal vein is a blood vessel that carries blood from the gastrointestinal tract , gallbladder , pancreas and spleen to the liver . This blood is rich in nutrients that have been extracted from food , and the liver processes these nutrients ; it also filters toxins that may have been ingested with the food . 75 % of total liver blood flow is through the portal vein , with the remainder coming from the hepatic artery proper . The blood leaves the liver to the heart in the hepatic veins . </P>
venous blood from the viscera enters the heart via the
venous blood from the viscera enters the heart via the
hepatic veins
hepatic veins