<unk>  is the partial or complete wasting away of a part of the body. Causes of<unk>  include mutations (which can destroy the gene to build up the organ), poor nourishment, poor circulation, loss of hormonal support, loss of nerve supply to the target organ, excessive amount of apoptosis of cells, and disuse or lack of exercise or disease intrinsic to the tissue itself. In medical practice, hormonal and nerve inputs that maintain an organ or body part are said to have trophic effects. A diminished muscular trophic condition is designated as<unk> .<unk>  is reduction in size of cell, organ or tissue, after attaining its normal mature growth. In contrast, hypoplasia is the reduction in size of a cell, organ, or tissue that has not attained normal maturity.<unk>  is the general physiological process of reabsorption and breakdown of tissues, involving apoptosis. When it occurs as a result of disease or loss of trophic support because of other diseases, it is termed pathological<unk> , although it can be a part of normal body development and homeostasis as well.
Atrophy
Hyperplasia
Dysplasia
Aplasia
Hypoplasia
Metaplasia
Hypertrophy
Agenesis