Create an account
Insulates, cushions the underlying body tissue, protects the entire body from mechanical damage, chemical damage, thermal damage, bacterial damage
Most abundant epidermal cells;produce keratin fibrils; connected to each other by desmosomes
Nuclei of the cells in the deeper epidermal layers; shielding their genetic material from damaging effects of ultraviolet radiation
Constantly undergoing mitotic cell division> stratum germinativum; 10% to 25% are melanocytes; receive adequate nourishment via diffusion of nutrients from the dermis
thick weblike bundles of intermediate filaments made of a pre-keratin protein; receive adequate nourishment via diffusion of nutrients from the dermis
abundant granules contained by cells 2 types; lamellated> waterproofing glycolipid secreted into extracellular space, Keratohyaline> forms the keratin fibrils
20 to 30 layers; cells are dead and flattened scalelike remnants are fully keratinized
composed of areolar connective tissue; uneven; superior surface> dermal papillae- attach it to epidermis above; allows heat to radiate to the skin surface, pain, touch receptors
deepest skin layer, dense irregular C.T.; contains arteries, veins, seat, sebaceous glands, pressure receptors
Papillary & Reticular
collagenic and elastic fibers; fibroblasts, adipose cells, various types of macrophages& various others found in dermis
formed by epidermal and dermal cells; enclosed by thickened basement & glassy membrane, C.T. root sheath
Arrector pili muscle
smooth muscle cells connect each hair follicle to the papillary layer; muscles contract> hair follicle is pulled upright ( goose bump)
empty into a hair follicle, some open on the skin surface; are not on palms of hands or soles of feet
product of sebaceous glands, oily substances & fragmented cells that acts as a lubricant to keep the skin soft and moist
produce clear perspiration consisting promarily of water, salts, & urea; secrete perspiration when temp. or body temp. is high
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together