Create an account
innermost epidermal layer; aslo called stratum basale. is relatively dry and water resistant, but not water proof.
formed by the stratum germinativum which extend into the dermis and are adjacent to dermal projections
dermal papillae and epidermal ridges
are significant because the strength of the attachment is proportional to the surface area of the basal lamina.
or germinative cells, dominate the stratum germinativum. They are stem cells whose divisions replace the more superficial keratinocytes that are lost of shed at the epithelial surface.
sensitive to touch, when compressed, they release chemicals that stimulate sensory nerve endings.
consists of 8 to 10 layers of keratinocytes bound together by desmosomes; means spiny layer, refers to the fact that the cells look like miniature pincushions in standard histological sections.
they participate in the the immune response by stimulating a defense against microorganisms that manage to penetrate the superficial layers of the epidermis, and superficial skin cancers.
superficial to the stratum spinosum, also called grainy layer. Consist of three to five keratinocytes derived from teh stratum spinosum.
forms dense cytoplasmic granules that promote dehydration of the cell as well as aggregation and cross-linking of the keratin fibers.
contains 15 to 30 layers of keratinized cells. Located at the exposed surface of thick and think skin
or cornification, is the formation of protective, superficial layers of cells filled with Keratin. The process occurs on all exposed skin surfaces except the anterior surfaces of the eyes.
water from interstitial fluids slowly penetrates the surface, to be evaporated into the surrounding air causing you to loose roughly 500 ml of water. Unable to feel the water loss.
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