Introduction to Aging March 3, 2015

What happens when we age? The integumentary system consists of _____, _____ and _____. Stem cell production declines with age - Epidermal cells slow in their reproduction and become larger and more irregular. - The skin becomes thinner and more translucent. - More frequent skin injuries, tearing, and infections. Did you know…The speed of healing takes more than twice as long in the elderly as it does in a much younger person.

Melanocyte Activity The number of macrophages and other cells of the immune system decrease to about 50% of the level seen at maturity. - This loss causes further skin damage and risk of infection. As melanocyte activity declines, there is decreased protection from ultraviolet light. - Greater susceptibility to sunburn and skin cancer. - Skin becomes paler and hair turns gray or white.

Age Spots Melanocytes increase their production in areas exposed to the sun, resulting in brown spots on the skin

Sweat Glands and Vascularity Sebaceous gland activity declines. - Perspiration decreases - The skin becomes dry, scaly and itchy Vascularity and circulation also decrease in the subcutaneous tissues. - Medications are absorbed more slowly. Vascular supply to the nail bed decreases. - Dull, brittle, and thick nails, with a slowed growth rate.

Wrinkles The loss of fat and collagen in the underlying tissues causes the integument to weaken. - Skin sagging and wrinkling The dermis becomes thinner and less elastic as the fiber network decreases in size. - The skin weakens and becomes less resilient - Decreased ability to maintain body temperature