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24 Cards in this Set
- Front
- Back
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consists of the skin (an organ) and accesory organs
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Integumentary system
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protection, regulation of body temperature, retards water loss, houses sensory organs, synthesizes chemicals, excretes wastes
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Functions of integumentary system
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Stratified squamous epithelium
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epidermis
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one cell layer thick, firmly attached to basement membrane, mitotic layer, layer that needs to be protected from the sun, contains melanocytes
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Stratum germinativum
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spiny layer, cell membranes pulling apart from eachother and only attached at cell junctions, several layers thick
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Stratum Spinsum
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contains Keratin, Keratohyalin, this layer is far enough away from blood that death can occur
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Stratum Granulosum
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cells flattened, densly packed together, filled with solid granules, cells deffinitely dead at this point and look translucent
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Stratum Lucidum
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dead cells, still inerlocking, packed with kerotin (keritinization) remain for 2 weeks before shed
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Stratum Correum
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skin color due to
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dermal blood supply, and pigments
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what pigments effect skin color
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melanin and carotene
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supply the blood to skin, regulate body temperature, consists of Papillary layer and reticular layer
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dermis
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neuron that makes something move and causes actions
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motor fibers
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touch receptors in skin
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ineisner's corpuscle
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pressure receptors in skin
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Pacinian corpuscle
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not technically part of the skin, lies beneath the dermis, loose CT and adipose
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Superficial fascia or hypodermis
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epidermal cells, extend into the dermis
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hair follicles
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different then sebaceious follicles, look like baby fat cells, always next to hair follicles, opens into hair follicle
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Sebaceous glands
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produce sebum, also has antibacterial agent to it, oily lipid that coats hair shafts
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Holocrine gland
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empty to skin, cause acne if clogged
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Sebaceous follicles
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associated w/ hair follicles, respond to emotion. Arm pit and groin, no antibacterial properties so is thick, cloudy and smelly
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Apocrine glands
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not associated with hair follicles, sweating through pores, not smelly, thin and watery
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merocrine glands
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found in ear canal, produce earwax
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ceruminous glands
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earwax
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cerumen
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how does skin regulate body temperature
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increase blood flow to cool off and decrease to conserve heat
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