Pernicious Anemia. Macrocytic anemia, glossitis, peripheral neuropathy, weakness, hyperreflexia, ataxia, and other neurological manifestations characterize classical vitamin B12 (cobalamin) deficiency. It is common, however, to encounter patients with vitamin B12 deficiency who have atypical clinical or laboratory features.
Nutrient, Liquid and Energy Distribution. Most of the advantages of vascular tissues stem from this functional one: A tracheophyte's xylem and phloem--which comprise the vascular system and are housed in the stem--enable liquids, nutrients and energy to be transported and distributed throughout the whole of the plant.
In the very center of the plant, we find the vascular tissue system. This tissue provides support, but it also creates a highway of long-distance transport between the roots and other parts of the plants. Both water and nutrients are transported through the vascular tissue. The third system is the ground tissue system. This tissue accounts for most of the bulk of the plant and fills the spaces in between the dermal and vascular tissues.