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.
1 Special sweet potato variety with purple skin and bold purple flesh that intensifies when cooked. 2  Aside from its unique bold color, the Stokes PurpleÂ® Sweet Potato differs from other sweet potatoes and yams is in its flavor and texture, offering a favorably dryer, denser, and richer taste with well-balanced sweetness. Aside from its unique bold color, the Stokes PurpleÂ® Sweet Potato differs from other sweet potatoes and yams is in its flavor and texture, offering a favorably dryer, denser, and richer taste with well-balanced sweetness.