Dermis/ Subcutaneous Layers
Sebacuous glands
(oil glands) releases "sebum" which nourishes our skin and hair, keeping them healthy. Too much sebum causes oily skin and hair. Connects to the hair follicle
veins
blue, deoxygenated, carry blood to the heart
What causes acne and scarring?
clogged pore under the epidermis
lamellar corpuscle
deep pressure receptor
reticular layer
deepest portion of dermis, busiest part
Genetics
determines thickness and pattern distribution
decreased size of sebaceous glands causes
dry skin
What creates blackheads and pimples?
enlarged sebaceous gland
apocrine glands
forms during puberty, underarms/groins, produces a mucous fluid, smell comes from bacteria feeding on it, breaks down and causes odor, attaches to opening where hair comes through epidermis, located deeper than eccrine
subcutaneous layer (hypodermis)
innermost layer of the skin, containing fat tissue (adipose)
hair follicle
located surrounding hair bulb/root, where hair starts to grow, protects hair root
hair shaft
part of hair that is visible
arteries
red, carry oxygen, blood away from the heart
arrector pili
smooth muscle attached to hair follicle, when it contracts it extends the hair shaft, causing goose bumps
Hair
FUNCTION: protects the body LOCATION: everywhere on body other than palms of hands, palmer surface of fingers, soles, plantar surface of toes and foot
Collagen and elastic fibers
gives the skin ability to stretch and return to original shape
decreased production of melanin produces
gray hair
sudoriferous glands
sweat glands
Papillary Layer of the Dermis
upper layer FUNCTION: pain receptors, fingerprints, nourishment to epidermis
eccrine glands
we have when we are born, found all over, releases heat, fights bacteria, closer to surface, more numerous than apocrine, attaches to sweat pore
hair bulb/root
where hair is nourished by blood vessels. inferior portion enlarged area
decreased collagen produces
wrinkles