Term
epidermis
stratum basale
[image] |
|
Definition
deepest epidermal layer; one row of actively mitotic stem cells; some newly formed cells become part of the more superfiscial layers
|
|
|
Term
epidermis
stratum spinosum
[image] |
|
Definition
| several layers of keratincytes unified by desmosomes. cells contain thick bundles of inter mediate filaments made of prekeratin |
|
|
Term
epidermis
stratum granulosum
[image] |
|
Definition
3 to 5 layers of flattened cells, organelles deteriorating; cytoplasm full of lamellated granules ( release lipids) and keratohyaline granules
|
|
|
Term
epidermis
lucidum
[image] |
|
Definition
4th layer
clear layer
palms, soles and feet
a very thin translucent band of flattened dead keratincytes w/ indistinct boundaries |
|
|
Term
epidermis
stratum corneum
[image] |
|
Definition
last layer top
horny/ tough layer
the outtermost epidermal layer consist of some 20 to 30 cell layers and accounts for the bulk of epidermal thickness
fill w/ kaeratin
glycplipids in extra cellular space
|
|
|
Term
dermis
papillary layer
[image] |
|
Definition
top 20% of the dermis
superfiscial region compossed of areolar connective tissue
uneven and has finger like projections for its superior surface |
|
|
Term
dermis
dermal papillae
[image] |
|
Definition
| peglike projections that indent the overlying epidermis |
|
|
Term
dermis
reticular layer
[image] |
|
Definition
the deepest skin layer
compossed of dense irregular connective tissue and contains many arteries and veins, sweat and sabaceous glands, and pressure receptors |
|
|
Term
|
Definition
| subcutaneous tissue just deep to the skin: consist of adipose plus some areolar connective tissue |
|
|
Term
hair
hair follicle
[image]
|
|
Definition
part inside skin
structure formed from both epidermal and dermal cells. its inner root shealth has 2 parts (internal and external) |
|
|
Term
|
Definition
where it all starts
portion of the hair enclosed w/in the follicle |
|
|
Term
|
Definition
part that comes out skin
portion projecting from scalp surface |
|
|
Term
hair
arrector pili muscle
[image]
|
|
Definition
red muscle bilayer
makes hair stand up
small bands of smooth muscle contract each hair follicle to the papillary layer of the dermis |
|
|
Term
cutaneous glands
sabaceous glands
[image] |
|
Definition
makes oil
lubracates skin n hair
alll over skin except palms and sole of feet
usually empty in hair follicles but some directly on the skin |
|
|
Term
cutaneous glands
eccrine sudoriferous glands
[image]
|
|
Definition
sweat glands
distributed all over the body
clear perpiration water, salt, and urea
important part of body's heat regulation |
|
|
Term
cutaneous glands
apocrine sudoriferous glands
[image] |
|
Definition
in arm pits, genital region
produces sweat lipids and proteins
|
|
|
Term
sensory receptors
meissner's corpuscle
[image] |
|
Definition
small nerves light touch receptors
in dermal papillae
|
|
|
Term
sensory receptors
pacinian corpuscle
[image]
|
|
Definition
deep pressure touch receptor
have large receptive fields and are most sensitive to high-frequency stimuli, such as vibration. |
|
|
Term
sensory receptors
nociceptor
[image]
|
|
Definition
| free nerve ending pain receptor |
|
|
Term
|
Definition
glands secrete hormones that regulate processes such as growth, reproduction and nutrient use by body cells
slow acting control center
pineal gland, pituitory gland, thymus,parathyroid, thyroid gland, adrenal gland, pancreas, testes and ovaries |
|
|
Term
stratified columnar epithelium
[image] |
|
Definition
several cell layers; basal cells usually cubidal; superfiscial cells elongated and columnar
protection secretion
rare in body small amounts in male urethra and in large ducts |
|
|
Term
stratified cuboidal epithelium
[image] |
|
Definition
generally 2 layers of cublike cells
protection
largest ducts of sweat glands, mammary glands and salivary glands |
|
|
