chapter 5- integumentary system Flashcards
(25 cards)
layers of skin structure
epidermis, dermis, subcutaneous
epidermis
avascularized, keratinized, made of stratified squamous and rests on basement membrane
5 layers of epidermis
stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, stratum basale
stratum corneum
outermost of epidermis, prevents dehydration
stratum lucidum
layers of dead skin cells ONLY on palms and soles
stratum granulosum
alive with granules, where cells die
stratum spinosum
thick layer of keratinocytes
stratum basale
deepest layer, active mitosis, melanocytes
dermis
core, innermost layer of skin 1-2 mm thick, made of irregular dense connective tissue
dermis main function
binds epidermis to underlying tissue
dermal papillae
make fingerprint
hair follicles, blood vessels, nerve and muscle cells, glands found in
dermis
subcutaneous
below dermis, loose connective
main function of subcutaneous
anchor skin to muscle and bone
3 pigments
melanin, carotene, hemoglobin
what determines skin color
shape and size of melanosomes
function of sebaceous oil glands
prevent dehydration and inhibit growth of certain bacteria
suderiferous
sweat
mammary glands
modified sweat glands that secrete milk
ceruminous glands
secrete earwax
6 functions of skin
protection, body temp regulation, sensation, metabolism, blood reservoir, excretion
3 barriers of skin protection
physical, biological, chemical
touch receptors
meissner’s corpuscles
pain receptors
nociceptors
