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Unformatted text preview: keratinocytes- Merkel cells: associate with disclike sensory nerve endings to form Merkel disc - a sensory receptor for touch Layers of Epidermis:- Thick skin has 5 layers (strata) Stratum basale, stratum spinosum, stratum granulosum, stratum lucidum & stratum corneum- Thin skin has only 4 layers. .. missing stratum lucidum; stratum corneum thinner Stratum Basale (Stratum Germinativum): basal layer; deepest epidermal layer firmly attached to dermis- single layer of cells; cell division produces new keratinocytes for all layers Stratum Spinosum: several layers thick; intermediate filaments form network & attach cells at desmosomes- keratinocytes are flat & spiny (prickle cells)- some melanin granules; Langerhans' cells Stratum Granulosum: 3-5 cell layers thick- keratohyaline granules: help in keratin formation- lamellated granules: contain waterproofing glycolipid - released into extracellular space to prevent water loss...
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- Fall '10
- Anthropology, stratum basale, Stratum lucidum, Stratum Corneum, stratum spinosum, Stratum Granulosum