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ANAPHY-INTEGUMENTARY.pdf - ANAPHY - INTEGUMENTARY SYSTEM...

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ANAPHY - INTEGUMENTARYSYSTEMIntegumentary SystemConsists of the skin andaccessory structures, such ashair, glands, and nails.Integument means coveringCan indicate physiologicalimbalancesIntegumentary System Functions1.Protection. Protects againstabrasion and ultraviolet light.2.Sensation.It has sensoryreceptors that candetectheat,cold, touch, pressure, and pain.3.Vitamin D production.Skinproduces a molecule that can betransformed to vit D whenexposed to UV light4.Temperature regulation.Bloodflow and sweat glands both helpregulate body temperature.5.Excretion.Waste products arelost through the skin and in glandsecretions.SkinMade up of two major tissuelayers:epidermis and dermis.Skin rests onsubcutaneoustissuewhich is not a part of theskin2 Major Tissue Layers:1. EpidermisThe epidermis is themostsuperficial layerof the skinPrevents water loss and resistsabrasionAlso known ascutaneousmembrane, is keratinizedstratified squamous epitheliumComposed of distinct laters calledstrataThestratum corneumis themost superficial stratumof theepidermis consists of deadsquamous cells filled with keratinKeratingives the sc its structuralstrengthCells of the deepest strataperformmitosisAs new cells form they push oldercells where they slough or flakeoff.Dandruffis the excessivesloughing of stratum corneumcellsA callusis thickened areaproduced when layers in stratumcorneum increasesStratum Corneumcan thicken toform a structure calledcorn.2. DermisComposed ofdensecollagenous connective tissuecontaining fibroblasts,adipocytes, and macrophagesCollagen fibersare oriented inmany directions;Elastic fibersare responsible for the structuralstrength ofthe dermis andresistance to stretch, the dermiscan be damaged,Rachelle Anne C. Inguito
Cleavage linesor tension linesin the skin are more resistant tostretchIf skin is overstretched for anyleavingstretch marksDermal Papillateis projectionstoward the epidermis found in theupper dermis and contains manyblood vessels.The DPL in of the H-SOF-T arearranged in P, CR that shape theoverlying epidermis to fingerprints andfootprintsSkin Color Factors:Pigments in the skinBlood CirculationThe thickness of stratumcorneumPrimary Pigments of Skin Color:Melanin and CaroteneMelaninPigmentsresponsible for skin,hair, and colorMost melanin molecules arebrown to black pigments, someare yellowish or reddishProvidesprotection against UVlightProduced bymelanocytesandpackaged to vesicles calledmelanosomeswhich move intothe cell processes ofmelanocytesEpithelial Cellsphagocytize thetips of melanocyte cell processesacquiring melanosomesFormfreckles or molesin someregions of the skinMelanin productionisdetermined by genetic factors,exposure to light, and hormones

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Term
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Rachelle Anne C Inguito

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