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what epidermis layer is:
- filled with keratinized dead cells
- 3 quarter of epidermal thickness
- protects from water loss and abrasion
corneum
hair thinning can happen due to:
-high fever
-surgery
-emotional trauma
-drugs
-diet deficiency
externally invisable, and important to surgeons
cleavage lines
layer of the dermis that:
- made of areolar tissue, loose collage, and elastic fibers
- creates touch receptors
papillary layer
expanded area at deep end follicles
hair bulb
caused by follicular response to DHT
male patterned baldness
-found near joints
-causes deep creases in hands, wrist, fingers, and toes
flexure lines
from infancy to adult hood
-skin thickens
-accumulation of more subcutaneous fat
-sweat and sebaceous gland activity increases creating acne
layer of the dermis that:
-makes up 80% of the dermis
- made up of dense fibrous tissue
- has many elastic fibers
- collage fibers provide strength and resiliency
reticular
designed to cool body
sensible perspiration
abnormal coloration or shape of the - can be an indicator for disease
nail
- hair results when melanin production decreases and air bubbles replace the melanin in shaft
gray or white
as the - makes new cells it pushes older ones upward
hair matrix
-small band of smooth muscle attached follicle
-also responsible for Goosebumps
arrector pili
top layer of the dermis
papillary layer
can hold up to 5% of blood
skin
- affects hair growth
nutrition and hormones
the protein that gives skin its protective properties
keratinocytes
think skin has - layers
5
- and - become more common in adulthood
scaling
dermatitis
death cells
apoptosis
-yellow to orange
-can be converted to vitamin A
-obvious in plams and soles
carotene
cerumen=
earwax
what epidermis layer is:
- only found in thick skin
- made of dead keratinocytes
lucidum
nail fold that projects into surface of the body
eponychium
- is considered a sensory touch receptor
hair
-protects that deep epidermis
-key activator of immune system
dendritic cells
long hair usually found on the:
-scalp
-axillary and pubic region after puberty
-eyebrows
-on neck and face of males
terminal hair
what epidermis layer is:
- 4-6 cells thick
- aka transitional layer
- keratinization begins here
- where it becomes water resistant
- cells above this die
granulosum
partial thickness burns aka
second degree burns
deepest in the epidermis
melanocytes
skin acts as a physical barrier by
blocking water and water soluble materials from entering the body
the white part of the nail (below cuticle) is called
lunule
in the thick skin there are -
friction ridges
if the secretion on a whitehead oxidizes it becomes a
blackhead
hair pigments are made by - in the hair follicle
melanocytes
with a burn an immediate threat is - and -
dehydration
electrolyte
contractible nervous system stimulation to force sweat into ducts
myoepithelial cells
- can activate some hormones and disarm some carcinogens
keratinocytes
low pH of skin retards baterial multiplication
acid mantle
dermal tissue containing a knot of capillaries that supplies nutrients to growing hair
hair papilla
the hair follicles extend from - to -
epidermal surface
dermis
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