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.
â¢ Vascular plants have true stem, leaves and roots. But non vascular plants have stem and leave like structures and rhizoids, instead of true structures. â¢ Xylem tissues of vascular plants contain lignified tissues, and those provide support and rigidity to plant.Due to unavailability of water conducting tissues non vascular plants are tender and comparatively shorter than vascular plants. Xylem tissues of vascular plants contain lignified tissues, and those provide support and rigidity to plant. Due to unavailability of water conducting tissues non vascular plants are tender and comparatively shorter than vascular plants.