Functions of the integumentary system
Selective permeability, the skin chooses what enters into body and what doesn't
absorption
Outermost layer, dry surface that protects against infection and abrasion
Stratum corneum
Oxygen-binding protein in red blood cells, it also turns bright red when binding to oxygen
hemoglobin
Dermal blood vessels that are used to control heat. Either conserving or expelling heat in a process called vasoconstriction or vasodilation.
Temperature regulation
Deepest layer, has a single layer of cuboidal cells
Stratum basale/germinativum
Dark pigment produced in melanocytes, transferred to keratinocytes, varies in person to person depending on factors like uv exposure
Melanin
Dermal cells that detect outside stimuli, feelings of touch and pressure
Sensory reception
3 to 5 layers of keratinocytes, this is where Keratinocytes begin keratinization
Stratum granulosum:
Yellow-orange pigment acquired from some vegetables
carotene