Epidermis - abin da yake da shi? A tsarin da epidermis

Skin, bisa ga yawa dermatologists, shi ne wani hadadden mutum sashin jiki. Samun mahara yadudduka da kuma da dama na ayyuka, Hearty cibiyar sadarwa na jini da kuma kungiyoyin na jijiya rabe samar da shi muhimmanci a cikin kariya daga wani mutum daga muhalli dalilai. Bugu da ƙari, cikin fata kuma taka ta sadarwa rawa, da ciwon da ikon karɓar tactile bayanai daga waje duniya. Bari na sama Layer na epidermis da muhimmanci ne kawai a matsayin inji shãmaki, da darajar ne manya-manyan.

Janar halaye na epidermis

Layer rarraba, maturing, mutuwa da kuma riga matattu Kwayoyin ne epidermis. Mene ne wannan? Wannan duka masana'anta wanda yana da mahara yadudduka wanda Kwayoyin samu daga wannan tushen ba, amma shirya a matakai daban-daban dangane da mataki na maturation. A epidermis ne na farko shãmaki duniya da fuskantar da wani yiwuwar hatsari ga jiki da muhalli factor.

Lebur tsarin: yadudduka da fata

mai lebur tsarin da fata - 3 yadudduka yin daban-daban ayyuka. A mafi muhimmanci na wadannan ne dermal da ciwon jini, rabe da kuma tsokoki. Har ila yau, dake a cikin dermis gashi. Kuma su "m", kazalika da kusoshi, ne epidermis. Mene ne wannan? Wannan jaraba Layer located kawai sama da dermis da kuma taka wata rawa m, ba kawai a dangane da shi, amma kuma dukan kwayoyin. Kadan zurfi dermis ne kasa muhimmanci Layer na fata - nama, inda mai accumulates a adipocytes.

Lebur tsarin da epidermis

A mafi zurfi Layer ne muhimmi wanda dukansa ya ƙunshi Kwayoyin iya rarraba. Saboda su akwai wata maido da lalace Kwayoyin da ƙari na rasa jaraba ma'auni. A kauri daga cikin muhimmi Layer melanocytes located guda tara abu baki pigment (melanin) da ake bukata domin ultraviolet kariya na fata.

Prickly Layer located sama da muhimmi da kuma gina a cikin nau'i na layuka 3-8 rayuwa Kwayoyin riga iya raba. Suna guda biyu zuwa juna ta hanyar cytoplasmic protrusions don goya inji ƙarfi daga fata. A yankunan da fata hõre waje tsoma faruwa akai-akai, da yawan yadudduka spiny Kwayoyin ƙaruwa zuwa 8-10 guda. A wadannan wurare akwai wani sunadarin gumi da gashi: kafar da hannu. Tare da m lalacewar wasu rabo daga cikin yadudduka da epidermis kuma thickened samar da wata callus.

Nan da nan sama da spinous Layer ne granular, wanda yana dauke da rabin matattu epidermal Kwayoyin. Su da wasu gabbansa rasa ikon sarrafa makamashi, amma tara wani gagarumin adadin tonofibrils. Granular Layer hada da kawai 1-2 cell yadudduka daidaitacce layi daya da fata surface.

Brilliant Layer kira Kwayoyin gaba daya bã tãre da wasu gabbansa. Su nufi - inji kariya na fata da kuma a hankali a hankali nau'i nau'i, ƙasƙanci ne ga sashen dutsen corneum. A karshen ne na waje. Shi ne mai hade da matattu scaly Kwayoyin, wanda ne mai girma da shamaki zuwa pathogenic tsoma.

Aiki na epidermal Kwayoyin

Babban aiki na epidermis halittar inji, ta jiki, da nazarin halittu da kuma sinadaran shingen, delimiting da ciki yanayi daga m da kuma ainihin pathogens. Amma dai ba duka matsayin ake buga ta da epidermis. Mene ne shi, da kuma yadda kamar daki?

• Da fari dai, da farfajiya Layer delimits yanayi na jiki da kuma waje duniya don kare jiki da kuma ga hana yayyo na da muhimmanci abubuwa da aka gyara.
• Abu na biyu, da shi na tsare mai epidermis da ionizing corpuscular da kuma kalaman radiation na low ikon, tare da abin da jiki ta yau da kullum.
• Uku, da epidermis na fata - mai kyau sinadaran shamaki su hana shigar azzakari cikin farji da kuma sha na hydrophilic abubuwa. Kuma da lipophilic (mai-mai narkewa) suna da kyau assimilated.
• Kuma karshe a jerin, amma ba kasa muhimmanci aiki - nazarin halittu kariya. Akwai sosai kananan adadin kwayoyin da fungi cewa zai iya harba mutane ta hanyar fata. Basic m rawar da aka buga ta da epidermis. Mene ne wannan? Wannan shi ne mai kyau inji shãmaki cewa kawai ba da damar samun wata cutar, kwayoyin, naman gwari ko m cikin jiki, haddasa kumburi a can.

Ba tare da melanocytes da matattu Kwayoyin daga epidermis ayyuka ba a aiwatar. Epithelial Kwayoyin aiki a matsayin mai inji shãmaki, kuma melanocytes - Tantancewar. Wannan yana nufin cewa cuticle kare da lalacewar da danshin daga cikin ruwa, da kuma pigment Kwayoyin - daga ultraviolet radiation. Duk wannan ya yarda mutum ya daidaita da yanayin da faruwa a cikin al'ada duniya. Bayan duk, fata ya yarda da ci gaba da kwayoyin daga wanda mutum ya samu, daga ruwan kuma cinye ƙasar.

Babban fasali na epidermis

All yadudduka da fata phylogenetically fitar ga samar da wasu ayyuka. A epidermis ne dermis aka tsara don kare kan inji, jiki da kuma sinadaran effects. Yana da ake bukata na rage asarar ruwa wanda za a iya ƙafe daga bãyan tẽkun kawai bayan mugunya sunadarin gumi. Wani hanya domin physiological ruwa yayyo daga jiki ta hanyar fata ne akwai.

Idan muka yi la'akari da epidermis daga wani kwaskwarima ra'ayi, da bayyane ne da wadannan abubuwa. Wannan fata Layer iya ba da wrinkles da kuma scars, akwai wani jini. An powered by yadawa na abubuwa daga jini na dermis na fata. Saboda haka ta kawai kwaskwarima matsaloli ne da wadannan: hyperkeratosis (thickened epidermis yadudduka) da kuma fata peeling. Magance wadannan mamaki, kuma psoriasis, da kuma maganinta, na bukatar da aikace-aikace na kayan shafawa.

Pathology na epidermis kuma melanocyte

Akwai da dama Categories cututtuka da za su iya sha da epidermis. Mẽne ne da kuma yadda za a data jihohi suna bayyana, karanta a kasa. Sinfi na farko - cututtuka hade tare da ƙara multiplication na epidermal muhimmi Layer Kwayoyin. Cutar da ake kira psoriasis. Akwai kuma wani nakasar yanayin - ichthyosis, a cikin abin da jariri da aka riga haife tare da hyperkeratosis kuma ba mai yiwuwa. Na biyu kungiyar na cututtuka na epidermis - da ƙari. Daga cikin epidermis zai iya ci gaba muhimmi cell sankara da kuma melanoma. A karshen fãra daga melanocytes.