over skin notes Flashcards
functions of integumentary system
protection,regulation of temp., communication of sensations to CNS and synthesis of material (sweat)
Epidermis
outer layer of cells contain keratin; thick layer protect from abrasion, VITAMIN D produced here
whats keratin
fibrous protein that makes skin waterproof
name the 5 layers of the epithelium
stratum corenum,lucidum,granulosm,spinosum,basale
mnemonic to remember layers of epithelium
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stratum corenum
outer most layer, dead and dying cells; sloughs off easily; contains carotene, a yellowish pigment; fingernails are modified portion of this layer
stratum lucidum
found only in thick, non-hairy skin, palms of hands and soles of feet
stratum granulosum
middle layer; keratin
stratum spinosum
another mid. layer of cells with spiny like projections
stratum stratum basale
aka stratum germinativum-layer directly on top of dermis,MELANOCYTES FOUND BETWEEN THESE CELLS, AND PRODUCE MELANIN WHICH GIVES THE SKIN COLOR AND PROTECTS IT FROM UV LIGHT
What structure has a high amount of keratin to make the hard
nails
Nail bed
layer of stratum basale and stratum spinosum beneath the nail
nail root
where nail grows
nail body
part of nail thats visible
eponychium
cuticle