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Unformatted text preview: Ÿ-1Statum BasaleŸSingle layerŸKeratinocytes (produce keratin, for water-proofing)ŸMelanocytes (produce melanin)ŸTactile (merkel) cells (sensory)ŸStratum SpinosumŸ8-12 layers of growing cellsŸKeratinocytesŸSpinyŸLangerhans cells (phagocytic cells, engulfing foreign material)ŸStratum GranulosumŸ3-5 rows of flattened cellsŸStratum LucidumŸOnly present sometimesŸThin clear layerŸLips, palms, soles of feet Ÿ(dead, too far from blood supply)ŸStratum CorneumŸOuter layer of flattened cellsŸKeratinizedŸProtein: protects (light, heat, chemicals, microorganisms)ŸMelanin (brown)Ÿ(albinism, tanning, frecklesŸCarotene (yellow)ŸHemoglobin (red/pink)ŸCyanosisŸBruisesŸDermis LayersŸPapillary layer (top 20%)ŸReticular layer (bottom 80%)ŸTactile Sensors of the DermisŸFree nerve endings (touch)ŸMeissner’s Corpuscules (touch)ŸPacinian Corpuscles (deep pressure)ŸHair = (Naked apes)ŸServes some purposeŸ(protection, warmth, sensation)ŸHard keratinŸTerminal hair (2mm/week)...
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- Spring '07
- Stratum Corneum, Skin anatomy, flattened cells Stratum