1.skin histol lina 2011

7/25/2019 1.Skin Histol Lina 2011

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Structure of Skin and Its

Appendages

dr. Ni Made Linawati, M.Si

Histology departmentMedical Faculty of Udayana University


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OUTLINE

1. Skin

! "#ick skin

! "#in skin

layer, cells

$. Skin %ppendages

! Se&aceous gland! Sweat gland

! Hair

! Nail


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Structures of the Skin

'pidermis

(ermis

Hypodermis

Hair follicle

Sweat pore

Nerves

MuscleSweat

gland

Fat

Se&aceous

gland

Hair)loodvessels


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Functionals of the skin structure

1. *ermea&ility &arrier epidermis

$. *rotection from pat#ogen,uv

+. "#ermoregulation sweat gland, &lood vessel

. -eception of continual sensations from t#e

environment merkel cells, meisners

. '/cretion sweat gland

0. *#ysical appearance melanocyte

. 2ound repair3regeneration

4. %&sorpsion epidermis


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kin layer

1. Epidermis

2. Dermis

3.Hypodermis


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EPIDERMIS 5rigin from ectoderm Stratified s6uamous keratini7ed epit#elium or stratums cells types

Dermis 5rigin from mesoderm 8onnective tissue cells, matri/9 fi&ers $ layerscontents

HIPOE!"IS! Loose connective tissue! %ccumulate of adipocyte cells


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CELLS OF THE EPIDERMIS


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I##igrant $ells of The Epider#is


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%eratinoc&tes

"#e largest population ofcells

%rranged in five layer

Morp#ology different

depend on t#e strata

8ells in diff. strata produced

diff. type of keratin protein


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%eratinoc&te differentiation


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"elanoc&tes

Neural crest

epidermis Synt#esi7e melanin (eep layer of epidermis Morp#ology rounded or

cu&oid9 proc of cytoplasmstratum spinosum 8ytoplasmgranules

melanosomescytocrinesecretion

*rotect us from uvradiation ::::::


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E!"IS


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!eticular La&er

Papillar& La&er

dermis: Papiar! and Reticuar a!ers


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SU($UTANEOUS LA)E!


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S%IN APPENA'ES

S')%S'5US =L%N(

S2'%" =L%N(

H%>-

N%>L


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SE(ASEOUS 'LAN


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SE(ASEOUS 'LAN


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S*EAT 'LAN

'88->N' S2'%" =L%N(; M'-58->N'

%*58->N' S2'%" =L%N(UN('- "H'

>NFLU'N8' 5F H5-M5N'S

M5(>F>'( =L%N( 8'-UM>N5US %N(

M%MM%-? =L%N(

S'8-'"5-? UN>", (U8",

M?5'*>"H'L>%L 8'LLS


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S"eat #ands


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S*EAT 'LANS +E$$!INE,


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S*EAT 'LANS +APO$!INE,


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S-eat 'lands


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HAI!


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HAI! Filamentous, keratini7ed

structures t#at pro@ect

from t#e epidermalsurface of t#e skin

"ype+

Hair follicles develop from

epidermis and invade t#edermis and #ypodermis

Hair root and dermalpapilla#air &ul&

Hair s#aft

8ells matri/ cells,melanocytes

HAI! FOLLI$LE


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HAI! FOLLI$LE

Functions warm, s#ield,filter

Hair growt# cyclesanagen, catagen, telogen

NAIL


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NAIL

Aeratini7ed epit#ellialcells arranged in plates of#ard keratin

"erm nail plate, nail &ed,nail matri/, nail root,eponyc#ium,#yponyc#ium, lunula


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SU""A!)

"#ick vs t#in skin different

! in epidermis Bstratum vs C

Skin appendages

! Sweat =land Becrine vs apocrine S=C

! Se&aseous =land

Secretion9 location9 open9 #ormonal influence9

etc

! Hair, nail

skin vs #air vs nail differ in keratin type


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THAN% )OU

1.skin histol lina 2011

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