Aging is a universal phenomenon. There is probably no single cause of aging.
Several theories have been proposed to explain the cause of aging some of which
explain aging on the basis of changes occurring at the genetic level after adulthood.
Several events during the life span appear to be genetically controlled. However, the
variations that are observed in the timing and duration of various phases such as;
development, adulthood, and aging are modulated by extrinsic factors such as;
nutrition, temperature, radiation, pollution and physiological stress, as well as by
intrinsic factors such as hormones and free radicals. Cellular aging is generally thought
to be influenced by complex cellular functions which cause change in protein
synthesis and turnover, and reduce the efficiency of DNA repair and activity of
enzymes. The integumentary system, particularly the skin, is one of the most conspicuous
features of the body and provides obvious reminders that a person is aging. Skin
aging is given in general appearance as wrinkles and sages
Aging is a universal phenomenon. There is probably no single cause of aging.Several theories have been proposed to explain the cause of aging some of whichexplain aging on the basis of changes occurring at the genetic level after adulthood.Several events during the life span appear to be genetically controlled. However, thevariations that are observed in the timing and duration of various phases such as;development, adulthood, and aging are modulated by extrinsic factors such as;nutrition, temperature, radiation, pollution and physiological stress, as well as byintrinsic factors such as hormones and free radicals. Cellular aging is generally thoughtto be influenced by complex cellular functions which cause change in proteinsynthesis and turnover, and reduce the efficiency of DNA repair and activity ofenzymes. The integumentary system, particularly the skin, is one of the most conspicuousfeatures of the body and provides obvious reminders that a person is aging. Skinaging is given in general appearance as wrinkles and sages
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