![]() ![]() ![]() Not a mere barrier, the integument is involved in the maintenance of body temperature and internal hydration, sensory functions, and immunological surveillance. The skin, a full one-sixth of body weight, is a sophisticated and dynamic organ, which serves as a bulwark between the sensitive internal tissues of the body and the external environment. The skin is also the most visible indicator of age. 2 The skin is incredibly durable, but like all other systems, it eventually succumbs to the inexorable effects of aging. 1 Women have longer average life expectancies than do men and can thus soon expect to spend more than one-third of their lifetimes in menopause. L ife expectancy in the United States and other industrialized countries continues to increase and is expected to reach 100 years by about 2025. ![]()
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