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epidermis structure

basale one layer thick cell is cuboidal to columnar in shape cells containing melanocytes, continuous cell division occurs in this region. (BIRTH)
spinosum made up of several layers they appear to be thorn like or spiny active living normal keratinocytes they have not started to die yet (LIFE middle age)
granulosum cells start to die. the first thing you notice is that they have specs in the cytoplasm-granules.it consists of 3-5 layers in thick skin and 2-3 in thin skin. they develop darkly staining granules of a substance called "keratohyalin"-precursor of keratin
lucidum dead flat cell that is clear. here the keratohyalin becomes Eleidin which will become keratin in the stratum corneum
corneum dead surface layers-in thick skin it is 25-30 layers thick, 3-5 in thin skin. makes calluses on feet and hands. the extra thick protective layer
Created by: sarahanatomy