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Atrophy is the partial or complete wasting away of a part of the body.
Causes of atrophy 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.
Atrophy is a general physiological process of reabsorption and breakdown
of tissues, involving apoptosis on a cell level. When it occurs as a result
of disease or loss of trophic support due to other disease, it is termed
pathological atrophy, although it can be a part of normal body development
and homeostasis as well.
Atrophy examples
In normal development Examples of atrophy as part of normal development
include shrinkage and involution of the thymus in early childhood and the
tonsils in adolescence.
Breast atrophy Atrophy
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