Neurons are masters of communication, transferring messages throughout your body – even when you’re not thinking about it. They make sure you can interact with the world, and that your body runs smoothly on the inside.

Glial cells are just as important as the neurons themselves. In the central nervous system (brain and spinal cord), some glial cells act as the brain's immune system, protecting neurons from harmful substances. Other glial cells are responsible for insulating the neuronal axons - the long segments of the neuron - thereby ensuring that the messages are transferred efficiently and accurately.