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20 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Skin
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-made of keratin
-k = waterproof protein -grows in layers -repairs itself -loose connective tissue = stretchy -barrier, protects, keeps out bacteria, retains body fluid, regulates body temp, eliminates waste |
made of
job strech |
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Skin
Epedermis |
-outer layer
-shed skin when it grows -dead, flat skin cells -hair follicles -Basal Layer: bottom living layer (blood diffuses by osmosis thru blood vessels to basal) -melanocysts in basal |
where
made of contains bottom layer shed |
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Skin
Dermis |
-inner layer
-live cells -blood vessels, glands (sweat=cool, oil=smooth skin), sense nerves, muslce fibers (goose bumps) -fat layer beneath it |
made of
contains (4) underneath... |
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Nails
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-keratin, modified hairs, protein
-cells grow under skin at nail root around base/sides of nail plate -3-6 months for complete growth (continuous) -excersize = faster growth |
-made of
growth length of growth |
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Nail
Parts |
Nail Matrix- area in which nail grows
Nail Plate- clear nail part Nail Bed- holds nail in place w/skin (tissue + blood vessels) Opinchium- cuticle |
4 of them
jobs where look |
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Nail
Injury |
Hangnail- torn skin around nail
-due to dry skin/bite Ingrown Nail- nail plate grows into nail bed -due to tight shoes, genes Leukonychia- (white spots) damaged matrix -often = need more zinc |
-where
why |
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Hair
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Hair follicle- cluster of cells in epedermis
1-cells grow at hair root (fed by tiny blood vessels) 2- pushes up shaft (visible hair) 3-cells die as they move up shaft away from blood vessels 4-become hard keratin -scalp hair grows continuously -others grow 2 years, fall out -protect, insulate, regulate temp |
-hair follicle
growth becomes... growth length job |
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Tanning
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-melanocysts in epedermis basal layer release melanin
-melanin (pigment) protects body from sun rays -skin = dark |
where
what when result |
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Tanning
Dangers |
1- Not enough melanin to prootect skin
2-Rays go to in skin 3-Sunburn (red, pain, inflammed, peeling) 4-Repeated Sunburn... 5-SKin Cancer: -sun mess up DNA -modifies cell genes -replicate = tumor -premature aging of skin |
cause
leading to sunburn skin cancer how other danger |
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Tanning Prevention
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-stay out of sun between 10-2
-wear protective layers -SPF 30+ -reapply often -waterproof -don't wait for burn symptoms (takes 2-4 hours to show) |
examples:
when what do |
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Coloration Skin + Hair
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-hereditary
-melanocystes produce melanin (pigment) Eumelanin (brown/black hair) Pheomelanin (red) Low Melanin (blond) Melanocysts don't work (gray) |
-cause
specifics gray |
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Moisturizers
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-have water + oil
-water diffuses in epedermis skin cells thru ossmosis -plumps them up -oil keeps water from evaporating |
cotain
how work |
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Wrinkles
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Young:
-have elastin + collagen in loose connective tissue -skin retains water well Old: -skin loses elastin/collagen -can't retain water well -skin = thinner Result: -fat dissapears -epedermis sags Alpha-Hydroxy Cream- -water diffuses in cells in folds in skin -plumps them up -oil holds it in |
young
old result alpha hydroxy cream |
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Sweat
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-sweat glands in dermis/epedermis in hair follicle
-excretory organ = release excess water, urea, salts -regulates body temp: 1-body temp increases 2-Stimulates glands in hair follicles to release sweat 3-water evaporates w/heat + skin is cooled |
where
job how job |
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Sweat
Yellow BO |
BO:
-bacteria mixes w/sweat in hair follicle -metabolizes protein Yellow: -sweat has carbs in it |
cause
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Sweat
Antiperspirants |
-clog/block pores w/astringents so they can't release sweat
-body can't cool -deo neutralizes smell |
job
how result |
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Acne
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-plugged pores
-gene triggers puberty, triggers hormones 1-increase in hormone level 2-oil glands more active 3-sebaceous follicle (S gland + hair follicle) make pore 4-oil secretions of sebum (fatty substance) build up underneath + plug it up 5-bacteria enters WBC fight =pimple |
other name
puberty role cause |
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Acne
Treatments |
-to prevent acne
-improve acne -prevent scarring -decrease sebum production, reduce bacteria, eliminate inflammation |
purpose
how |
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Blisters
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1. Skin rubs against something
2. Rubs off inner layer of skin but not outmost 3. Serum (fluid) enters from nearby tissues as result of damage |
cause
effect |
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Calluses
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1. area often rubbed, irritated, blistered
2. skin cells in are die often 3. dead cells accumulate + harden/thicken 4. protects against pressure,friction,injury |
cause
effect job |
