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.
Plants don't depend entirely on the vascular tissue system for transportation, the plants themselves can transport any necessary fluids and/or nutrients throughout their systems. A plant's vascular system is composed of two networks of hollow tubes, similar to our veins and arteries. Each network consists of a different type of vascular tissue that works to move different resources throughout the plant. These vascular tissues would be the tissues known as xylem and phloem.