Integumentary System Flashcards
Dermis contains
blood vessels, nerves, sensory receptors, nails, and other accessories
hair generated by
epithelial cells at the base of the hair follicle
sebaceous glands
surround hair follicle. an accessory structure originating in the dermis that secretes sebum onto hair emerging from the hair follicle
ceruminous glands
combine with dead epithelial cells to form cerumen (ear wax)
sebum function
keep keratin flexible and water resistant
apocrine sweat glands
found in anogenital region. accessory structures of the dermis that are in physical association with hair follicles, producing a secretion with an odor (possibly a sex pheromone to humans). Apocrine sweat glands have a higher concentration of fatty acids than sweat. when bacteria uses apocrine sweat components as nutrients, they quickly change its odor to one of rancid fatty acids, found disagreeable to most people.
eccrine sweat glands
also called merocrine sweat glands. accessory structures, originating throughout the dermis of the human body which secrete sweat used primarily for thermoregulation. Found in dermis of body.
Functions of integumentary system
*Removes metabolic waste
*Synthesizes vitamin D
*communication and sensory tool
*provides protection to the body
*main organ in temperature regulation
Where are thermoreceptors located
hypothalamus and skin
Hypothalamus role in integumentary system
acts as the body thermostat
- stimulates cutaneous vasodilation, sweat, or shivering, vasoconstriction, respectively
Sweat lowers body temperature through
evaporative cooling
how does the skin make vitamin D
by absorbing ultraviolet radiation from the sun and using it to convert a cholesterol-based precursor into vitamin D
What is a function of vitamin D
to help the intestine absorb dietary calcium
