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Intrinsic ageing and extrinsic ageing are terms used to describe cutaneous ageing of the skin and other parts of the integumentary system, which while having epidermal concomitants, seems to primarily involve the dermis. [1] Intrinsic ageing is influenced by internal physiological factors alone, and extrinsic ageing by many external factors.
The free radical theory of aging states that organisms age because cells accumulate free radical damage over time. [1] A free radical is any atom or molecule that has a single unpaired electron in an outer shell. [ 2 ]
Aging is a complex, progressive process that leads to functional and aesthetic changes in the skin. This process can result from both intrinsic (i.e., genetically determined) as well as extrinsic processes (i.e., environmental factors).
Symptoms of Wrinkles. Wrinkles are a symptom of aging, but some early signs of wrinkles can include fine lines. Later, deep wrinkles may form, particularly around the mouth, nose, eyes, and forehead.
According the experts, there are a few lesser-known and more subtle signs of skin aging that are good to know about. Skip to main content. Lifestyle. 24/7 help. For premium support please call: ...
External signs of aging are here understood as those signs of biological aging that qualify as bodily changes in structure occurring outside viscera and visible to the unaided eye See also: Intrinsic and extrinsic aging
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