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.
Pulmonary Vein. The four veins that carry blood from the lungs to the heart are called pulmonary veins. Unlike other veins, the blood in pulmonary veins is full of oxygen. The blood is pumped in to the the left atrium of the heart and then circulated throughout the body by arteries.