Synapses are the things in your body that send messages to other parts of your body to move. Move your finger, if you didn't have synapses, your finger wouldn't move. Synapses and nerves are also very needy things. In fact, if you don't get enough calcium, vitamins, and nutrients, your nerves won't work properly. So it is important to eat healthy. And stay away from Mischievous Megan and her candy.