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.
This allows the leaves to obtain water and nutrients that are necessary for the manufacture of food from light energy (photosynthesis). Food made in the leaves is then transported down to the roots and to other parts of the tree for growth. The pipes in the trunk are known as vascular tissue.It is this vascular tissue which we exploit to make paper and other forest products. Wood is primarily made of xylem (tracheids in conifers, vessel elements in hardwoods) that behave very much like a bundle of straws. Try crushing a bundle of straws from the side.his allows the leaves to obtain water and nutrients that are necessary for the manufacture of food from light energy (photosynthesis). Food made in the leaves is then transported down to the roots and to other parts of the tree for growth. The pipes in the trunk are known as vascular tissue.