Most of the axons in the central nervous system are wrapped in myelin, a substance rich in lipids (fatty substances) and proteins. Like the coating around an electrical wire, myelin insulates and protects the axon and helps speed nerve transmission.
Potato/Semi Round Pearls. Potato pearls are some of the less expensive freshwater pearls to be found on the market, but their look is anything but cheap. You can purchase potato pearls in every color of the rainbow, and craft beautiful one of a kind creations for gifts and your own collection.
Potato is one vegetable that is used across cultures and countries as a staple food, and it is the fourth largest food crop after rice, maize, and wheat. There is another vegetable called sweet potato that is not as popular as potato, though it is also used in all parts of the world.