minggu3 skin integumentari

8/12/2019 Minggu3 Skin Integumentari

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Skin and the IntegumentarySkin and the IntegumentarySystemSystem

Composed of several tissues

Maintains homeostasisProtective covering

Retards water loss

Regulates body temperature

Houses sensory receptors

Contains immune system cells

Synthesizes chemicals,

including Vitamin

!"cretes small amounts of

waste


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Epidermis, Dermis, & Basement Membrane

Epidermis is subdivided into layers of stratifiedEpidermis is subdivided into layers of stratifiedsquamous epitheliumsquamous epithelium Dermis is made up of connective tissue, epithelial tissue,Dermis is made up of connective tissue, epithelial tissue,

smooth muscle tissue, nervous tissue, and blood.smooth muscle tissue, nervous tissue, and blood. Basement membrane is anchored to the dermis by shortBasement membrane is anchored to the dermis by short

fibrils and separates these two layers of skinfibrils and separates these two layers of skin


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EpidermisEpidermis

lac#s blood vessels

#eratinized

thic#est on palms and soles $%&'()&*mm+

melanocytes provide melaninrests on basement membrane

stratified suamous


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EpidermisEpidermis

-ayers of !pidermis

stratum corneumstratum lucidum

stratum granulosum

stratum spinosum

stratum basale


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Layers of the EpidermisLayers of the Epidermis


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Skin Chanes! "ashesSkin Chanes! "ashes


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Chicken #o$

Shinles

Lyme Disease %mpetio


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&elanocytes and #iment 'ranules&elanocytes and #iment 'ranules


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(ll people have the same number of(ll people have the same number of

melanocytes in their skinmelanocytes in their skin


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(lbinism! Lack of &elanin(lbinism! Lack of &elanin


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#aul Bettany in Columbia #ictures) *he#aul Bettany in Columbia #ictures) *he

Da +inci Code -/Da +inci Code -/

*0E (LB%12 &2134


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DermisDermis

dermal papillae

binds epidermis to underlying

tissuesirregular dense connective tissue

on average )&%(.&%mm thic#

muscle cells

nerve cell processes

blood vessels

hair follicles

glands


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Subcutaneous LayerSubcutaneous Layer

hypodermis

loose connective tissue

adipose tissue

insulates

ma/or blood vessels


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Hair FoicesHair Foices

epidermal cells

tube(li#e depression

e"tends into dermis

hair root

hair shaft

hair papilla

dead epidermal cellsmelanin

arrector pili muscle


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'rey5s (natomy'rey5s (natomy

E6(LES

27 0(%"

C2L2"

+("%(*%21

!ed Heads

ha"e iron

pigment

#trichosiderin$

E"eryone

e%cept abinos

ha"e "arious

amounts of

meanin in

their hair

'ith age, a

oss ofmeanin in hair

can ead to

grayness


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(ais(ais

protective coverings

nail plate

nail bed

lunula

0(1


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Sebaceous )andsSebaceous )ands

usually associated with hair

follicles

holocrine glands 2

disintegrating cell and its

contents for the secretion

secrete sebum

absent on palms and soles


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S*eat or Sudoriferous )andsS*eat or Sudoriferous )ands

widespread in s#in

deeper dermis or hypodermis

eccrine glands 2 types of

merocrine gland that secrete fluid$sweat+ product released through

the cell membrane

aprocrine sweat, ceruminous$wa"+, 3 mammary $mil#+

glands 2 types of aporocrine

glands that secrete cellular

product and portion of the free

ends of cells


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!eguation of Body!eguation of Body

+emperature+emperature


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*he *an &an at *he ?niversity of 3ansas*he *an &an at *he ?niversity of 3ansas

http!@@www-.lAworld.com@news@-=@may@9@hesstill

tanafteralltheseyears@4citylocal


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Heaing of -utsHeaing of -uts


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Heaing of BurnsHeaing of Burns

5irst degreeburn 2 superficial partial(thic#ness

$epidermis damaged+

Second degreeburn 2 deep partial(thic#ness $epidermis

3 dermis damaged+

8hird degreeburn 2 full(thic#ness $epidermis, dermis,

3 accessory s#in structures+autograft $self(transplant+

homograft $temporary transplant from donor+

various s#in substitutes

e"tensive scars


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!ue of (ines!ue of (ines


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Life Span -hangesLife Span -hanges

Scaly s#in

9ge spots

ermis becomes reduced

-oss of fat

:rin#les

Sagging

Sebaceous glands secrete

less oil

Melanin production slows

Hair thins

;umber of hair follicles

decrease


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Life Span Chanes SkinLife Span Chanes Skin


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-inica .ppication-inica .ppication

9cne Vulgarismost common s#in disorder

sebum and epithelial cells clog glands

produces whiteheads and blac#heads $comedones+

anaerobic bacteria trigger inflammation $pimple+largely hormonally induced

androgens stimulate sebum production

treatments include antibiotics, topical creams, birth control pills


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Common Skin DisordersCommon Skin Disorders

(thlete5s foot > tinea pedis or rinworm funal infection of the foot.(thlete5s foot > tinea pedis or rinworm funal infection of the foot. Birthmark > conenital blemish or spot on the skin.Birthmark > conenital blemish or spot on the skin. Boil > bacterial infection of the skin produced when bacteria enter a hairBoil > bacterial infection of the skin produced when bacteria enter a hair

follicle.follicle. Carbucnle > bacterial infection, similar to a boil, that spreads into theCarbucnle > bacterial infection, similar to a boil, that spreads into the

subcutaneous tissues.subcutaneous tissues.

Cyst > fluidfilled capsule.Cyst > fluidfilled capsule. Ecema > noncontaious skin rash.Ecema > noncontaious skin rash. Erythema > reddenin of the skin due to dilation of dermal blood vessels inErythema > reddenin of the skin due to dilation of dermal blood vessels in

response to inAury or inflammation.response to inAury or inflammation. 0erpes> characterie by a recurrin formations of small clusters of vesicles0erpes> characterie by a recurrin formations of small clusters of vesicles

usually caused by herpes simple$ virus contaious.usually caused by herpes simple$ virus contaious. 3eloid > elevated enlarin fibrous scar usually initiated by an inAury.3eloid > elevated enlarin fibrous scar usually initiated by an inAury. &ole > fleshy skin tumor that is usually pimented.&ole > fleshy skin tumor that is usually pimented. #ediculosis > disease produced by an infestation of lice.#ediculosis > disease produced by an infestation of lice. #ruritus > itchin of the skin.#ruritus > itchin of the skin. #usule > elevated, pusfilled area.#usule > elevated, pusfilled area.


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6eroderma #imentosum6eroderma #imentosum

E$treme frecklin and skinE$treme frecklin and skin

cancer due to lack of D1(cancer due to lack of D1(

repair enymes.repair enymes.


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*ypes of Skin Cancer*ypes of Skin Cancer

Squamous cellcarcinoma >

derived from

epithelial tissue

Basal cellcarcinoma >

derived from

epithelial tissue

&alinantmelanoma >

derived from

melanocytes

minggu3 skin integumentari

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