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.
Fresh roots are a sign that your sweet potato is spoiled. Cut into the sweet potato and look for any dark brown spots on the inside of the flesh. These spots can sometimes be difficult to spot on the outside. If they are on the inside, your sweet potato is unfortunately bad. Fruits and Veggies Matter: Vegetable of the Month: Sweet Potatoes.