2 major parts Skin tissue accessory structures
assuffte
Dermalpapillae
cutaneous Epidermis
Sebaceousgland
membrane
Dermis HairFollicle
ubcutaneous
Layer Hypodermis BloodVessels
Skin sweatgland
I Enfors
paintempetc Adiposetissue
Lamellated Corpuscle Arrectorpilimuscle
Epidermis 95
stratified squamous epithelium
are Keratinocytes largeamounts of keratin
Avascular nutrients oxygen diffusecapillaries
Stratum corneum
multiple layers dead nonuclei water resistant
most superficial lose desmosomes whichallowsto shred
Everydayyou shred a milliondead keratinocytes 8poundsa yr
Stratum lucidum
Appears as a glassy layer in thick skin only
superficial to the stratum granulosum there is
clearlayer of deadkeratinocytes
a
Onlyfound in thickskin
Stratum Granulosum
keratinocytes produce keratin the cells die
Themiddle consists of 3 5 rows of cells
Produces 2 types of granules membranecoating
granules
Keratinbundles
Superficial keratinocytes release the contents of
membrane
, g
Stratum Spinosum
Keratinocytes are boundtogetherbydesmosomes
L G Sb Thickest of edidermis
Prickle cell layer actively produce largeamounts ofkeratin
cells appearspikey
cells are nearbloodsupply metabolically mitoticallyactive
Help produce vitaminD Glipidbasesubstances
Stratum basale
Basal stem cell layer above basementmembrane
Single layer of stemcells that rest on the basementmembrane
Slightly cuboidal or columnar
Deepestlayer of epidermis thin
keratinocytes closest to blood supply mostmetabolically active
Sloughing Keratinocytes
Dendriticcell11
Keratinocytes
Dermis
Merkelcell
melanocyte DividingKeratinocyte
assuffte
Dermalpapillae
cutaneous Epidermis
Sebaceousgland
membrane
Dermis HairFollicle
ubcutaneous
Layer Hypodermis BloodVessels
Skin sweatgland
I Enfors
paintempetc Adiposetissue
Lamellated Corpuscle Arrectorpilimuscle
Epidermis 95
stratified squamous epithelium
are Keratinocytes largeamounts of keratin
Avascular nutrients oxygen diffusecapillaries
Stratum corneum
multiple layers dead nonuclei water resistant
most superficial lose desmosomes whichallowsto shred
Everydayyou shred a milliondead keratinocytes 8poundsa yr
Stratum lucidum
Appears as a glassy layer in thick skin only
superficial to the stratum granulosum there is
clearlayer of deadkeratinocytes
a
Onlyfound in thickskin
Stratum Granulosum
keratinocytes produce keratin the cells die
Themiddle consists of 3 5 rows of cells
Produces 2 types of granules membranecoating
granules
Keratinbundles
Superficial keratinocytes release the contents of
membrane
, g
Stratum Spinosum
Keratinocytes are boundtogetherbydesmosomes
L G Sb Thickest of edidermis
Prickle cell layer actively produce largeamounts ofkeratin
cells appearspikey
cells are nearbloodsupply metabolically mitoticallyactive
Help produce vitaminD Glipidbasesubstances
Stratum basale
Basal stem cell layer above basementmembrane
Single layer of stemcells that rest on the basementmembrane
Slightly cuboidal or columnar
Deepestlayer of epidermis thin
keratinocytes closest to blood supply mostmetabolically active
Sloughing Keratinocytes
Dendriticcell11
Keratinocytes
Dermis
Merkelcell
melanocyte DividingKeratinocyte
