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.
The veins in monocots are not arranged in circles, like in a tree. Instead, they are scattered throughout the plant. You can see the veins the best on the leaves of the plant, where they are arranged in parallel lines. Take a look at this iris, paying special attention to the green leaves.