<unk>  is the partial or complete wasting away of a part of the body. Causes of<unk>  include poor nourishment, poor circulation, loss of hormonal support, loss of nerve supply to the target organ, disuse or lack of exercise or disease intrinsic to the tissue itself. Hormonal and nerve inputs that maintain an organ or body part are referred to as trophic.<unk>  is a general physiological process of reabsorption and breakdown of tissues, involving apoptosis on a cellular level. When it occurs as a result of disease or loss of trophic support due to other disease, it is termed pathological<unk> , although it can be a part of normal body development and homeostasis as well.
Atrophy
Hyperplasia
Dysplasia
Hypoplasia
Metaplasia
Anaplasia
Hemihypertrophy
Dissection 