4_Integumentary System_outline_filledin (1).docx

Usually associated with hair follicles located

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proteins, etc.; usually associated with hair follicles; located everywhere but palms of hands/soles of feet, can slow water loss/condition skin, etc. o Sweat or Sudoriferous Glands (Fig 5-14) o Merocrine or eccrine- found in most areas of the body, merocrine secretion of clear fluid through sweat glands, helps to regulate body temperature o Apocrine- located in axillary/pubic regions, function at puberty, secretion more viscous/cloudy, can react with bacteria (i.e. BO) Control of secretion and role in homeostasis - cooling through evaporation of sweat from skin surface, vasodilation of blood vessels near surface of skin; warming through shivering/muscle contraction (heat released), hairs raised to trap heat, blood vessels constricting to keep warm blood near body core (talked about in homeostasis) Injury and Disease o Burns (Fig) 1 st degree- damages epidermis only (i.e. sunburn), redness, pain 2 nd degree- damages epidermis/some of dermis, painful, blistering 3 rd degree- full-thickness; irreversible damage to epidermis, dermis, and potentially underlying tissue, loss of function o Cancer (Fig) Basal cell carcinoma- originates in stratum basale, most common, least deadly Squamous cell carcinoma- originates in keratinocytes of stratum spinosum/granulosum, treatable
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