The liver is made up mainly of cells called hepatocytes. It also is made up of other types of cells, including cells that line its blood vessels and cells that line small tubes in the liver called bile ducts.The bile ducts extend out of the liver and carry bile from the liver to the gallbladder or directly to the intestines.t also is made up of other types of cells, including cells that line its blood vessels and cells that line small tubes in the liver called bile ducts. The bile ducts extend out of the liver and carry bile from the liver to the gallbladder or directly to the intestines.