Final answer:
Lobules in the liver radiate outward from a central vein to the periphery of the lobule, constituting the hexagonal-shaped hepatic lobule, which is the liver's functional unit made up of hepatocytes.
Step-by-step explanation:
Lobules radiate outward from a central (hepatic) vein to the periphery.
The structure of the liver includes the hepatic artery, which supplies oxygenated blood to the liver, and the hepatic lobule, a hexagonal-shaped structure. The hepatic lobule is the functional unit of the liver, made up of millions of liver cells known as hepatic cells or hepatocytes. These plates of hepatocytes, also called hepatic laminae, radiate outward from the central vein at the core of each hepatic lobule, which is critical for the liver's vast metabolic functions.