Portal vein provides what percentage of the liver's blood flow?

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The liver has dual blood supply, with the portal vein delivering the majority of inflow. Portal venous blood provides about three quarters of the liver’s blood flow, while the hepatic artery contributes the remaining roughly one quarter. This arrangement ensures a large volume of nutrient-rich blood reaches hepatocytes for processing, while the arterial supply provides the needed oxygen. It’s also worth noting that portal blood, despite its higher flow, is relatively low in oxygen compared with arterial blood, so both sources are important for overall hepatic function.