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6 terms

Accessory structures of the skin

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hair
columns of dead keratinocytes held together by proteins with two main regions
shaft
first region, portion above the skin, have three circular layers of cells
root
second region, portion under the skin thru epidermis down to dermis, have three cicular layer of cells
medulla
inner, central layer
cortex
thickest layer surrounds the medulla, majority of the shaft makes up most of the hair
cuticle
outter layer, made of a single row of keratinocytes