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Integumentary System

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by

Theresa Akerley

on 20 March 2015

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Transcript of Integumentary System

Integumentary System Function
Waterproofing
Protection
Cushioning
Temperature Regulation
Sensory Reception
Secretion
Synthesis
What happens when parts of the skin fail and how does it repair itself?
Wrinkled, pruny fingers in the bathtub
Infections
Autoimmune Diseases
Cancer
Burns and Scar
Let's start with infections...
Bacterial
Viral
Fungal
:. furnuncle, caruncle
boil, cyst, cellulitis, pus
Treatment:
Clean Area
Antibiotics
Prevention:
Keep skin in good condition
Watch for signs
Measles
Mumps
Rubella
5th Disease
Herpes, Chicken Pox
HPV
Treatment:
antiviral
boost immune system
Prevention:
vaccines
protection
Athlete's foot
jock itch
ringworm
Treatment:
antifungal
Prevention:
Keep skin dry
Not barefeet in public areas
Don't share equipment
Autoimmune Diseases
psoriasis
scleroderma

Skin Cancer
Actinic Keratosis
Basal Cell Carcinoma
Squamous Cell Carcinoma
Malignant Melanoma
Basal:
95% cure rate
Basal layer of epidermis
Squamous:
95 % cure rate
Deeper into dermis
Melanoma:
75% death rate
Cancer of the melanocytes
Prevention:
Sunscreen
Diligence and Observation
Burns:
generally fluid from blood vessels leak causing swelling, pain, blistering
Sunburns
Sun penetrates epidermis which is mostly dead, old skin
Cooks the newly forming living cells in the dermis
Cells absorb the heat
Repair system included blood rushing area, inflammation, pain
Darkening is the skins way of protecting itself
Levels of Severity
1st degree: in epidermis layer
2nd degree: all of epidermis and part of dermis
3rd degree: all of epidermis and all of dermis
Razor Burn
Essentially shaving peels off the top layer of the epidermis resulting in tissue injury.

Ingrown hairs versus Razor Bumps
Scars
Generally the skin's repair system
Sun Scars
age spots
actinic keratosis
Keloids
The body's continued production of fibrous protein called collagen
Epidermis:
outer most layer
made of many dead cells in flattened sheets
filled with protein keratin
melanin (which gives cells color) is made by melanocytes in bottom layer of epidermis.
Melanin is protection from UV radiation
Dermis:
made of living cells and specialized structures ( sensory neurons, blood vessels, muscle fibers, hair follicles, glands)
Subcutaneous layer:
Contains fat cells for insulation and cushioning.
Hair:
cells made of keratin and produced by hair follicle
shaft is made of dead cells overlapping like shingles
color is made by melanin in hair follicle, as cells are pushed out of dermis, they die, but hold onto melanin

Nails:
made of keratin
nail bed is full of blood vessels
when cells divide in nail root, they are pushed out
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