4/22 Flashcards
3 primary social dimensions
age
race
gender
everyone can potentially join AGE
drop off age in movies
40-60
due to agism and sexism
skin aging process
more time to recover
reduction in number and activity in stem cells
skin becomes thinner – decrease protection
collagen fibers where
dermal / second layer
elastic fibers
dermal layer
not stretching as much
skin aging
reduction in stem cell thinner fiber deteriation facial expressions less immune cells more sun exposure
largest organ is
skin
skin specific functions / broad categories
- protective
- barrier against thermal and mechanical and pathogenic
- by epidermis (physical) - sensory
mechanoreceptors - thermoregulatory
- fatty layer / hair = thermo regulation
sweat glands - remove excess heat
- metabolic
- water electrolyes and proteins - sexual signaling
reflect identity and mood
skin layers
epidermis and dermis
dermis from
mesoderm
papillary and reticular layer
epidermis from what layer
ectoderm
keratinocytes manly in
epidermis
bind and process antigens
langerhans in stratum spinosum
stratum lucedum
only in thick skin
reticular layet
thicker layer in dermis
bundles of type 1 collagen
more fibers than cells
lymph is here
subcutis layer
below dermis
subcutis layer
below dermis
mechanoreceptros
stretch
vibration
thermo receptors
hot and cold
nociceptors
pain receptors
unencapsulated
merkel -
peripheral nerve endings
peripheral root plexes
encapsulated
FASTER
miesner corpuscles - light touch . in lips a lot
pacinian – pressure touch - palms and soles
ruffini - reticular layer of dermis
eocrine glands not where
function?
on lips
thermoregulation and excretion , and protection
late in first trimester
epidermis invaded by langerhans celss - arise from precurser in bone marrow
