Hepatocytes measure between 20 and 30 µm in each dimension. They are in charge of developing all the functions of the liver such as the metabolism of lipids, carbohydrates and proteins, as well as the processing of hormones and drugs. Hepatocytes constitute about 80% of the cell population of the liver, with the other 20% being occupied by Kupffer cells, hepatic stellate cells, endothelial cells and mesothelial cells, which are not exactly characteristic of the liver, but are present in the liver samples.[2]