integumentary system outline health occ. integumentary system composed of skin accessory structures...
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Integumentary System Outline
Health Occ
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Integumentary System
Composed ofSkin Accessory structures
Accessory structures includehairNailsGlandsnerves
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Integumentary System
Main FunctionsCover and protect the bodyHelp regulate the body’s temperatureExcretes some of the body’s waste
materials Includes sensors for pain and sensation
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Skin
Functions Protects the body from injury protects the body from the intrusion of
harmful microorganisms Protects the body from the ultraviolet (UV)
rays of the sun helps to maintain proper internal
temperature of the body Serves as a site for excretion of waste
through perspiration serves as an important sensory organ
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SkinCovers
17 to 20 square feetVariations of Thickness
1/50 inch to ¼ inch thickThe skin on the back upper back is 10 times
thicker than the skin on the eyelid
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Skin
Layers of the skin and what they are composed ofEpidermisDermisSubcutaneous
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Epidermis
Outer layer of skin2 sub layers: stratum corneum, stratum
germinativumDead skin cells, melanin, 90% water
repellant
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Dermis
Makes ridges known as fingerprintsBlood vessels, nerve endings,
sebaceous and sweat glands, hair follicles
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Subcutaneous
Fatty and fibrous tissue, blood vessels and nerves
Fatty layer protects inner organs and maintains body temp.
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Hair
PilusHair
Where you do/don’t have hairAll areas except soles of feet and palms
Visible Portionshaft
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Hair
The root follicle
Oil glands Attached to each hair
Melanin Determines hair color No melanin = gray hair
Baldness (alopecia) Heredity, result of disease, injury, or medical treatment
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Glands
Three types of glandsSebaceousSudoriferousceruminous
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Sebaceous
Dermis, base of hair folliclesSecrete sebumLubricates, softens, and protects skin
from bacteria and fungi
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Sudoriferous (sweat glands)
Found almost everywhereCools the bodyDiaphoresis = sweating
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Ceruminous
Found in the auditory canal of earSecrete waxProtects ear from infection
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Nails Function
Protection Help with grasping
objects Allow us to scratch
Formed from Hard keratin
Lunula Crescent shaped
white area