Stratum corneum horny layer cornu greek for horn not

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1. Stratum corneum (Horny layer) “cornu” Greek for horn notwhat you are thinking!!!a. Top layer and fully keratinized b. 20-30 cell layers thickc. Protect skin from abrasion and penetrationd. Glycolipids provide waterproofinge. 40 lbs shed in a lifetimef. Too far from blood vessels for diffusion so cells die
Epidermis Con’t2. Stratum granulosum (Granular layer)a. 3-5 cell layers thickb. Keratinocytes produce keratin and squamous cells flatten as they are pushed upward (Held together by numerous desmosomes)3. Stratum spinosum (Prickly Layer)a. Prickly layer (Keratinocytes shrink but desmosomes hold in place)b. Melanin granules (UV protection) and Langerhan’s (macrophage) cells abundant in this layer
Epidermis Con’t
4. Stratum basale (Base germinating layer)

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