\u00d6rt\u00fc epitelinde, epitel h\u00fccreleri s\u0131k\u0131ca yanyana gelerek d\u00fczg\u00fcn ve devaml\u0131 bir tabaka olu\u015ftururlar. H\u00fccreleraras\u0131 aral\u0131k olduk\u00e7a dard\u0131r. \u00dcst y\u00fczeyleri ile v\u00fccudun bir i\u00e7 bo\u015flu\u011funa ya da d\u0131\u015f y\u00fczeyine bakarlar. Alt y\u00fcz\u00fc ile bazal lamina ad\u0131 verilen bir yap\u0131 arac\u0131l\u0131\u011f\u0131 ile ba\u011fdokusu \u00fczerine otururlar. \u00d6rt\u00fc epiteli damars\u0131z bir doku olup, \u00fczerine oturdu\u011fu ba\u011fdokusu i\u00e7indeki damarlardan bazal lamina arac\u0131l\u0131\u011f\u0131yla, dif\u00fczyon yoluyla beslenir. B\u00f6ylece bir d\u0131\u015fa bakan y\u00fcz\u00fc bir de bazal laminaya oturan kar\u015f\u0131 y\u00fcz\u00fc ile bu dokunun h\u00fccrelerinde bir kutupla\u015fma s\u00f6z konusudur. Epitel h\u00fccrelerinin fonksiyonlar\u0131n\u0131 ger\u00e7ekle\u015ftirdikleri serbest \u00fcst y\u00fczeylerine apikal y\u00fcz ya da apikal kutup ad\u0131 verilir. Beslenmesinin sa\u011fland\u0131\u011f\u0131 ba\u011f dokusu \u00fczerine oturdu\u011fu y\u00fczeylerine ise bazal y\u00fcz ya da bazal kutup ad\u0131 verilir. B\u00fct\u00fcn \u00f6rt\u00fc epiteli t\u00fcrleri, hatta d\u0131\u015f salg\u0131 bezi h\u00fccreleri bir bazal lamina \u00fczerine oturur. Bazal lamina kesitlerinde \u00f6zel tekniklerle ince bir \u00e7izgi \u015feklinde beliren tabakad\u0131r. \u0130ki katman olarak g\u00f6r\u00fcl\u00fcr. Bknz: Bazal lamina<\/p>\n
Epitel h\u00fccrelerinin apikal y\u00fczleri baz\u0131 h\u00fccrelerde olduk\u00e7a d\u00fcz iken baz\u0131 h\u00fccrelerde fonksi yonla ilgili olmak \u00fczere baz\u0131 \u00e7\u0131k\u0131nt\u0131l\u0131 yap\u0131lar i\u00e7erir. Bu yap\u0131lar, mikrovillus, kinosilya ve stereosilyad\u0131r.<\/p>\n
\u00d6rt\u00fc epiteli h\u00fccrelerinde,birbirine bakan yan y\u00fczeylerinde baz\u0131 yap\u0131 \u00f6zellikleri geli\u015fmi\u015ftir. Bir \u00f6rt\u00fc ve koruma g\u00f6revi sa\u011flayan bu h\u00fccrelerin kolayca da\u011f\u0131lmalar\u0131n\u0131 \u00f6nleyen bu yap\u0131lar h\u00fccrelerin birbirleri ile s\u0131k\u0131ca ba\u011flant\u0131lar\u0131n\u0131 sa\u011flayan \u00f6zellikler ta\u015f\u0131r. \u00d6rt\u00fc epitel h\u00fccrelerinin birbiriyle yapt\u0131\u011f\u0131 ba\u011flant\u0131larda \u00fc\u00e7 t\u00fcr yap\u0131 \u00f6zelli\u011fi oldu\u011fu elektron mikroskop bulgular\u0131 ile ortaya konmu\u015ftur. Zonula occludens, zonula adherens ve makula adherens (desmozomlar) adlar\u0131n\u0131 al\u0131rlar. Zonula okludens ya da terminal bar olarak da adland\u0131r\u0131lan ba\u011flant\u0131 t\u00fcr\u00fcnde kom\u015fu iki h\u00fccrenin membranlar\u0131n\u0131n d\u0131\u015f yapraklar\u0131 birbirine kaynam\u0131\u015ft\u0131r. Aradaki intersell\u00fcler aral\u0131k kaybolmu\u015ftur. Buradan madde ge\u00e7i\u015fi s\u00f6z konusu de\u011fildir. Zonula adherens t\u00fcr\u00fc ba\u011flant\u0131larda iki h\u00fccre membran\u0131 aras\u0131nda 200 angstr\u00f6ml\u00fck bir aral\u0131k kal\u0131r. Makula adherens dedi\u011fimiz yap\u0131larda ise intersell\u00fcler aral\u0131k biraz daha geni\u015f olup 250 Ao kadard\u0131r. Her iki yap\u0131 da h\u00fccre duvar\u0131nda kal\u0131nla\u015fm\u0131\u015f iki plaka \u015feklinde yap\u0131lard\u0131r. Birle\u015ftirici kompleks denilen bu yap\u0131lar \u00f6rt\u00fc epiteli h\u00fccrelerini kohezyonla bir arada tutar, epitel yap\u0131sal b\u00fct\u00fcnl\u00fc\u011f\u00fcn\u00fc korur. Epitel dokusunda h\u00fccrelerin alt y\u00fcz\u00fc ile bazal lamina aras\u0131nda hemidesmozom ad\u0131 verilen ba\u011flay\u0131c\u0131 yap\u0131lar bulunur.
\n Organizman\u0131n de\u011fi\u015fik b\u00f6lgelerinde bulunan \u00f6rt\u00fc epiteli gerek yap\u0131 ve \u015fekil gerekse fonksiyonel \u00f6zellikleri ile \u00e7e\u015fitlilik g\u00f6sterir.
\n Bu doku tipini s\u0131n\u0131fland\u0131r\u0131rken h\u00fccrelerin kat say\u0131lar\u0131na g\u00f6re:<\/p>\n
* tek katl\u0131 epitel
\n * \u00e7ok katl\u0131 epitel<\/p>\n
H\u00fccrelerin \u015fekillerine g\u00f6re:
\n * yass\u0131 epitel
\n * k\u00fcbik epitel
\n * prizmatik (silindirik) epitel olarak gruplan\u0131r.<\/p>\n
Her iki gruba g\u00f6re epiteller \u015f\u00f6yle s\u0131n\u0131fland\u0131r\u0131l\u0131rlar:
\n * Tek katl\u0131 yass\u0131 epitel
\n * Tek katl\u0131 k\u00fcbik epitel
\n * Tek katl\u0131 prizmatik epitel
\n * Yalanc\u0131 \u00e7ok katl\u0131 epitel (ps\u00f6dostratifiye)
\n * \u00c7ok katl\u0131 yass\u0131 epitel
\n * \u00c7ok katl\u0131 k\u00fcbik epitel
\n * \u00c7ok katl\u0131 prizmatik epitel
\n * \u00c7ok katl\u0131 de\u011fi\u015fici epitel (transisyonel)<\/p>\n","protected":false},"excerpt":{"rendered":"
\u00d6rt\u00fc epitelinde, epitel h\u00fccreleri s\u0131k\u0131ca yanyana gelerek d\u00fczg\u00fcn ve devaml\u0131 bir tabaka olu\u015ftururlar. H\u00fccreleraras\u0131 aral\u0131k olduk\u00e7a dard\u0131r. \u00dcst y\u00fczeyleri ile v\u00fccudun bir i\u00e7 bo\u015flu\u011funa ya da d\u0131\u015f y\u00fczeyine bakarlar. Alt y\u00fcz\u00fc ile bazal lamina ad\u0131 verilen bir yap\u0131 arac\u0131l\u0131\u011f\u0131 ile ba\u011fdokusu \u00fczerine otururlar. \u00d6rt\u00fc epiteli damars\u0131z bir doku olup, \u00fczerine oturdu\u011fu ba\u011fdokusu i\u00e7indeki damarlardan bazal …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1407,1403],"tags":[8247,8244,3444,8241,5865,2681,8246,5864],"class_list":["post-3856","post","type-post","status-publish","format-standard","hentry","category-fen-ve-teknoloji-odevleri","category-odevler","tag-cok-katli-epitel","tag-desmozom","tag-difuzyon","tag-epitel-hucreleri","tag-kubik-epitel","tag-ortu-epiteli","tag-tek-katli-epitel","tag-yassi-epitel"],"_links":{"self":[{"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/posts\/3856","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/comments?post=3856"}],"version-history":[{"count":0,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/posts\/3856\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/media?parent=3856"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/categories?post=3856"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/tags?post=3856"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}