Transmission electron micrograph (TEM) of the ultrastructure of a liver cell (hepatocyte). Part of the nucleus is at the bottom of the image. Typical for hepatocytes the intense metabolic activity is reflected by the rich supply of organelles such as rough and smooth endoplasmic reticulum, glycogen, mitochondria, lysosomes, peroxisomes and Golgi membranes. Magnification: x5,500.