Normal morphology of two peroxisomes (marked P) in a human liver parenchymal cell. They are contiguous with a narrow endoplasmic reticulum cisterna; this relationship is frequent. The image also shows a large dark lysosome with a membrane, contrasted with cerium by acid phosphatase activity. Several mitochondria are seen, and in the cytosol many glycogen rosettes typical for liver of a fed person; and a few fat droplets (no membrane). Marker = 0.5 µm.