Ch. 4 Flashcards
integumentary protection barriers
physical, chemical, biological (immune response)
integument thermoregulation is
sweating, blood vessels,
integument waste excretion is
secretions of sweat has waste
integument lipid synthesis
in hypodermis
integument megtabolic functions
hormones being actgivated, vitamin d
integument cutaneous sensation
pressure, vibration, temp, pain
two major components of integument
cutanous membrane (skin)
-superficial, epidermis, hypodermis
most superficial layer of skin
epidermis
epidermis has how many layers
five distinct
epidermis type epithelial tissue
keratinized stratified squamous
keratin
protein, produced by cells in epithelium, give epidermis toughness
deepest layer of epidermis is
stratum basale
stratum basale cells are attached to
basal lamina
stratum basale stem cells replace lost
kefratinocytes
how many days to replace epidermis cells
25-45 days
stratum basale contain meloncytes to
produce melanin to absorb ultraviolet radiation
stratum basale merkel cells
nerve endings to communicate when compressed
second deep layer of epidermis is
stratum spinosum
stratum spinosum desmosomes
tie cells together to distribute stress
above stratum spinosum is
stratum granulosum
how many layers of stratum granulosum
3-5 layers
stratum granulosun shows process of
keratinization
keratincytes in stratum granulosum stuff themselves with
protein
layer above stratum granulosum
stratum lucidum
how many layers of stratum corneum
15-30 layers
statum lucidum is only seen in
thick skin
most superficial layer of epidermis is the
stratum corneum
below epidermis is
dermis
dermis is what type of tissue
connective
dermis tissue components
leukocytes, fibroblasts, wbc
if you bleed in cut you hit
dermis layer
dermis papillary layer is
areolar ct with collagen, and elastic fibers
paillary layer of dermis has
dermal papillae to help make fingerprints pattern
below papillary layer is
reticular layer
reticular layer is
dense irregular ct with adipose cells and thick collagen fibers
below dermis is
hypodermis
according to textbook the hypodermis
is not part of skin
hypodermis anchors
skin to underlying structures
hair is
dead keratinized cells
the root of the hair is located
in hair follicule
at base of hair root
goes into swollen region for hair bulb
hair papilla is
blood vessels to provide to the hair
hair matrix
does cell divison to get more hair, pushes old cells upward
arrector pili muscle
causes goose bumps, help insolate
average scalp hair
100,000
vellus hair is
peach fuzz, babies all of em
2/3 of women hair is
vellus
90% of mens hair is
terminal hair
hair growth is fueled by
hormones and testosterone
what secretes sebum oil
sebaceous glands
what type of gland is sebaceous glands
holocine gland
sebum prevents hair
water loss
sebaceous follicles are on
face, back, chest, nipples, and external genitalia
cells in sweat glands
myoepithelial cells
most common sweat gland
eccrine sweat gland
3 million glands of
sweat on body
2 modified sweat glands
ceruminous glands and mammary glands
nails are a scale like modification of
stratum corneum
what is top of nail
nail body
what is below the nail body
nail bed
nail root is the coninuation of
nail body
nail root covers up
nail matrix
nail matrix pushes body outward
causes growth
nail matrix you can see
lanula
the cuticle is called
eponychium
skin cancer american rate
1/5
three types of skin cancer
basal cell, squamous cell, malignant melanoma
how many cancers are basal cell carcinoma
70%
which skin cancer is the least malignant
basal cell carcinoma
what causes basale cell carcinoma
proliferation of cells in stratum basale
squamous cell carcinoma arise from
keratinocytes in stratum spinosum
malignant melanoma is cancer of
melanocytes
highly spreadably skin cancer
malignant melonoma
skin cancer rule
ABCDE rule
ABCDE rule
asymmetry, border irregularity, color, diameter greater than 6 mm, evolving
