Lecture+10+Integumentary+System+Part+II

Skin soft and pliant prevents excessive water loss

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skin soft and pliant; prevents excessive water loss from the skin Lipid components have antifungal activity Simple, branched glands Found in dermis except in palms and soles Secretion increases in adolescence; may lead to formation of pimples and blackheads Sebaceous Glands 17 Monday, June 6, 2011
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Modified apocrine sweat glands Simple, coiled, tubular glands Empty contents into external ear canal alone or with sebaceous glands Mixed secretions of sebaceous and ceruminous glands called cerumen (wax) Function of cerumen to protect area from dehydration; excess secretion can cause blockage of ear canal and loss of hearing Ceruminous Glands 18 Monday, June 6, 2011
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Children Skin is smooth, unwrinkled, and characterized by elasticity and flexibility Few sweat glands and rapid healing Adults Development and activation of sebaceous and sweat glands Increased sweat production and onset of body odor Increased sebum production and potential acne Old age Decreased sebaceous and sweat gland activity resulting in wrinkling and lower ability of skin to cool itself The Skin Life Cycle 19 Monday, June 6, 2011
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The End 23 Monday, June 6, 2011
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