For example, a peripheral neuropathy caused by a vitamin deficiency can be treated -- even reversed -- with vitamin therapy and an improved diet. Likewise, nerve damage brought on by alcohol abuse can often be stopped and improved by avoiding alcohol.
2. Vascular tissue - xylem and phloem in leaves form in strands called veins. Xylem forms on the upper side of a vein (on a vertical leaf, on the side next to the stem), and phloem on the lower side (side away from the stem). a. Veins are like a leaf's fingerprint and can be used to identify plants.
Root System. Beneath the epidermis of the plant's root is a layer called the cortex, which is made up of layers of cells called vascular rays. The vascular rays carry water through the root and into the stele, the center of the root.Inside the stele are veins that serve as the circulatory system of the plant.oot System. Beneath the epidermis of the plant's root is a layer called the cortex, which is made up of layers of cells called vascular rays. The vascular rays carry water through the root and into the stele, the center of the root.