1-29-07 notes - -1Statum BasaleSingle layerKeratinocytes...

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Unformatted text preview: -1Statum BasaleSingle layerKeratinocytes (produce keratin, for water-proofing)Melanocytes (produce melanin)Tactile (merkel) cells (sensory)Stratum Spinosum8-12 layers of growing cellsKeratinocytesSpinyLangerhans cells (phagocytic cells, engulfing foreign material)Stratum Granulosum3-5 rows of flattened cellsStratum LucidumOnly present sometimesThin clear layerLips, palms, soles of feet (dead, too far from blood supply)Stratum CorneumOuter layer of flattened cellsKeratinizedProtein: protects (light, heat, chemicals, microorganisms)Melanin (brown)(albinism, tanning, frecklesCarotene (yellow)Hemoglobin (red/pink)CyanosisBruisesDermis LayersPapillary layer (top 20%)Reticular layer (bottom 80%)Tactile Sensors of the DermisFree nerve endings (touch)Meissners Corpuscules (touch)Pacinian Corpuscles (deep pressure)Hair = (Naked apes)Serves some purpose(protection, warmth, sensation)Hard keratinTerminal hair (2mm/week)...
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1-29-07 notes - -1Statum BasaleSingle layerKeratinocytes...

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