False colour scanning electron micrograph showing cellular organelles present in a spiral ganglion neuron. The structures shown in red/orange are mitochondria - these are the energy production units of the cell. The structure in blue is the golgi apparatus, which is responsible for packaging and secreating lipids and proteins for transport around the cell. These organelles are found in all eukaryotic (plant and animal) cells. This particular image shows organelles in a spiral ganglion neuron. This is a specialist nerve cell of the inner ear that transmits sound signals from the cochlea to the brain.