Anatomy and Physiology 1 The Integumentary System chapter 6.docx

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Anatomy and Physiology 1Chapter 6: The Integumentary SystemOctober 4 2018The integumentary systemSkin- cutaneous membraneoAccessory organs: hair, nails, sweat and oil glandsSkin structureo2 primary layers*Epidermis*DermisHypodermisHypodermis:oAreolar and adiposeoAnchors skin in placeoAllows skin to moveoFatty compositionShock absorberInsulatorDermis:oDeep layer of skinoStrong but flexibleoLoose and dense irregular connective tissueMostly collagenSome elastic fibersSome reticular fibersoContains blood vesselsoContains nervesoReticular layerDense irregular CToDermis: 2 layer structureoPapillary layerSuperficial layer of dermisAreolar tissue, many blood vesselsUpper surface has projections calledDermalPapillaeTemp regulationContain free nerve endings and touchreceptorsPush epidermis into epidermal ridges =fingertips
Ridges also help us hold objects - preventslippingoEpidermiscomposed of keratinized stratified squamousepitheliumnot all cells keratinized but do containkeratinthick skin- 5 layerspalms and feetthin skin- 4 layersavascularCells of epidermisstem cellsoundifferentiated cells

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Term
Spring
Professor
ROONEY
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