28 notecards = 7 pages (4 cards per page)
-makes up 16% of your body weight
What are the 2 components of the cutaneous membrane?
-underlying area of connective tissue
-hair, exocrine glands, and nails
-aka superficial fascia or subcutaneous layer
Functions of the Integumentary System
-protection of underlying tissues & organs
4 layers of thin skin
5 Layers of thick skin
-aka stratum germinativum
-cells that divide to replace the more superficial keratinocytes that are shed at the epithelial surface
Stratum Spinosum "Spiny Layer"
-consists of 8-10 layers of keratinocytes bound together by desmosomes
-aka Langerhans cells
Stratum Granulosum "Grainy Layer"
-consists of 3-5 layers of keratinocytes
-A tough, fibrous protein
Stratum Lucidum "Clear Layer"
-only in thick skin
-the formation of protective, superficial layers of cells filled with keratin
How long does it take for a cell to move from the Stratum Basale to the Stratum Corneum?
Around 7-10 days
-water from interstitial fluids slowly penetrates to the surface and evaporates into the air
-produced by active sweat glands
What are the two pigments found in the epidermis?
Carotene and Melanin
An orange-yellow pigment that normally accumulates in epidermal cells
pigment produced by the melanocytes
-manufacture both types of melanin from the amino acid tyrosine and packages it into intracellular vesicles called melanosomes
The __________ in keratinocytes protects your epidermis and dermis from the harmful effects of sunlight, which contains significant amounts of ultraviolet radiation (UV).
Blood contains red blood cells filled with the pigment ___________, which binds and transports oxygen in the bloodstream.
when the skins turns blue