Final answer:
The liver blood supply is labeled in sections to ensure efficient blood flow and processing. The hepatic artery carries oxygen-rich blood while the hepatic portal vein carries blood with nutrients and wastes. This sectional labeling helps with metabolism and waste removal.
Step-by-step explanation:
The liver receives its blood supply from two different sources: the hepatic artery and the hepatic portal vein. The hepatic artery carries oxygen-rich blood from the aorta, while the hepatic portal vein carries blood that is rich in digested nutrients from the gastrointestinal (GI) tract and wastes filtered by the spleen. The liver processes the blood from these two sources to remove certain wastes and excess nutrients.
The liver lobules, which are hexagonal-shaped structures, receive blood from these blood vessels that subdivide into smaller arteries and capillaries. This sectional labeling of the liver blood supply helps to ensure an efficient and organized flow of blood within the liver for processing.
For example, the hepatic artery and hepatic portal vein deliver blood to specific regions of the liver lobules, allowing for the metabolism of absorbed digestive components and the removal of wastes. The sectional labeling also helps to prevent vascular congestion and ensure proper circulation throughout the liver.