The Skin - Aging skin
Skin appearance is affected by both internal and external factors. A baby's skin has a silken quality because it has not yet begun to show the effects of continued exposure to sun and wind. The skin problems associated with adolescence reflect the many glandular changes that occur during the transition to adulthood. As the years pass, the skin becomes the most obvious indicator of aging.
Heredity, general health, and exposure to the elements are some of the factors that contribute to aging skin. Because people with darker skin have built-in protection against the ravages of the sun, their skin usually has a younger appearance than that of lighter-skinned people of comparable age.
In general, the skin of an older person is characterized by wrinkles and shininess. It feels thinner when pinched because it has lost its elasticity and part of the underlying fat that gives firmness to a younger skin.
Constant exposure to sunlight is now thought to play a more important role in the visible aging of skin than the aging process itself. Such exposure also appears to be directly related to the greater frequency of skin cancer among farmers, sailors, and others who spend most of their working hours out of doors.