Animation of a eukaryotic cell showing its internal components. These include the central nucleus (pink) that contains the cell's DNA (orange). Around the nucleus is the folded endoplasmic reticulum, which is studded with ribosomes, the site of protein synthesis in the cell. Also next to the nucleus is the pair of centrioles (grey) that form the centre of the centrosome, which organises the cell's microtubule cytoskeleton. Several ribbed mitochondra are seen, along with Golgi apparatus, lysosomes, peroxisomes and the cell membrane. This clip is supplied with an image mask for compositing.