Chp. 6/7 Skin
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| epthieal membrane | composed of epthilial tissue underlying the connective tisuue
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| connective tissue | composed of t=different types of connective tissues
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| Types of epithelial membranes | serous, mucous, cutaneous membrane
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| cutaneous membrane | the skin
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| serous memebrane | simple squamous, epithelium on a connective tissues basement membrane
partial- line walls of body cavaties
visceral- cover organs in body cavaites
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| pleura | serous memebrane, partial and visceral, lines wall of thoracic cavity and lungs
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| peritoneum | serous memebrane, partial and visceral lines wall and cover organs in adominal cavity
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| pleurisy | disease , inflammation of the serous membrane in the chest cavity
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| peritontius | innflmation of serous membrane in the adominal cavity
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| mucous membrane | epithelial, lines surfaces that open to the exterior, produces mucus
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| connective tissue membranes | does not contain epithelial produces synovial fluid in between joints and linning of brusal sacks
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| stratum germinativum | deepest most layer in the epidermis that continually produces cells , called pigment layer pigment cells called meloncytes produce the brown color pigments melanin
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| strantum corneum | outermost layer of keratin filled cells
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| epidermis color changes | pink- increase in blood volume or oxygen
cyanoisis- blue, decrease in blood oxygen
vitiligo- light patch skin loss of malaocytes
freckled- small macules
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| dermal-epidermal junction | area contact between epidermis and dermis called the spot welds
supports epidermis, weakning causes blisters
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| upper area of dermis | characterized by parallel rows of peglike dermal papiliea
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| thick skin | has parallel ridges and no hair
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| thin skin | irregular shallow grooves and hair
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| deep area | filled with collagenous and stretchable elastic fibers
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| striae | stretch marks
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| birthmarks | dermis, malformation of blood vessels
strawberry hemangioma
port whine stain
strok bite
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| lanugo | soft hair of fetus
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| hair follicule | hair growth from epithelial tubelike structure
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| hair papilia | hair growth begins here
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| alopecia | hair loss
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| arrector pili | smooth muscle that produces goose bumps
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| receptors | nerve endings make it able for skin to react like an organ
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| missenier tactile corpuscle | receptor dectects light touch
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| Lamellar pacini corpuscle | receptor able to detect pressure
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| nails | produced by epidermal cells, visble part is nail body , root lies in a groove hidden under the cuticle
cresent shaped is a lunlua
nail bed changes depending on blood flow
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| abnormalities in nails | onocyclosis- sepration from nail body
pitting- common in psorasis
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| two main types if sweat glands | sweat/ sudoriferous
sebaceous
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| sweat/ sudoriferous glands | eccrine- most numerous, and important, all ober body, produces sweat out the pores, regulate body heat
apocrine- in axilla and genitals, thicker sweat produces odor
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| sebaceous glands | produce oil for hair and skin
sebum- black heads
acne vulgaris- inflammation of sebaceous glands
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| first line of defense | microbes, Uv, chemicals, cuts and tears, bruising, skin grafts
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| temp regulation | sweat, and blood flow close to surface
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| skin lesion | variation is skins normal structure
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| elevated lesion cast shadow on their edges | papule- small
plaque- large
vesicle- blister
crust- scab
wheal- firm with light center
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| flat lesion- don't have a shadow | macule - flat discolered regions
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| depressed lesion - cast shadow within edge | ecoration- scratch
ulcer- craterlike
fissure - deep crack
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| first degree | partial thickness only epidermis
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| second degree | partial thickness deep epidermal and upper dermis
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| third degree | full thickness, epidermis and dermis
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| impetigo | skin infection highly contagious , stapylocco or strepococcoal
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| tinea | fungal ringworm
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| warts | benign caused by papilloma
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| boils | furuncles, in hair follicle, staphlococcoal
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| scabies | parasite infection
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| decubitus ulcers | bed sores when loss of blood flow
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| hives | cause y fluid loss in blood vessel
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| psoriasis | chronic inflammation with scaly plaques
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| Eczema | characterized by papules and crust
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| skin cancer | squamous, basal, and melanoma
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| squamous | most common hard rasied tumor
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| Basal | papules with central crater rarely spreads
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| melanoma | mole, most serious types
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