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This is an accepted version of this page This is the latest accepted revision, reviewed on 2 February 2025. Biological process of getting older This article is about ageing specifically in humans. For the ageing of whole organisms including animals, see Senescence. For other uses, see Ageing (disambiguation). Part of a series on Human growth and development Stages Gamete Zygote Embryo Fetus ...
Disengagement theory is the idea that the separation of older people from active roles in society is normal and appropriate and benefits both society and older individuals. Disengagement theory, first proposed by Cumming and Henry, has received considerable attention in gerontology , but has been much criticised.
Some disciplines and domains focus on the aging and the aged, such as the organic processes of aging , [3] medical studies of the aging process (gerontology), [4] diseases that afflict older adults , [5] technology to support the aging society (gerontechnology), and leisure and sport activities adapted to older people (such as senior sport).
Senescence (/ s ɪ ˈ n ɛ s ə n s /) or biological aging is the gradual deterioration of functional characteristics in living organisms. Whole organism senescence involves an increase in death rates or a decrease in fecundity with increasing age, at least in the later part of an organism's life cycle.
Cockayne syndrome is a homozygous or heterozygous mutation that results in short stature, abnormalities in head size, and slow growth and development. [62] Rothmund–Thomson syndrome is a rare autosomal recessive disorder that affects the skin. It is characterized by the sparse hair, juvenile cataracts, skeletal abnormalities, and stunted ...
Such an ageing process may include qualitative and quantitative changes and includes diminished or defective synthesis of collagen and elastin in the dermis. [citation needed] Extrinsic ageing of skin is a distinctive declination process caused by external factors, which include ultra-violet radiation, cigarette smoking, air pollution, among ...
The sale of purported anti-aging products such as supplements and hormone replacement is a lucrative global industry. For example, the industry that promotes the use of hormones as a treatment for consumers to slow or reverse the aging process in the US market generated about $50 billion of revenue a year in 2009. [3]
Adult development encompasses the changes that occur in biological and psychological domains of human life from the end of adolescence until the end of one's life. Changes occur at the cellular level and are partially explained by biological theories of adult development and aging. [1]