GASTRULYATSIYA XILLARI, LANSETNIKDA GASTRULYATSIYA JARAYONLARI, BALIQLARDA, QUSHLARDA, SUT EMIZUVCHILARDA GASTRULYATSIYA JARAYONLARINING O‘ZIGA XOS XUSUSIYATLARI
Keywords:
Kalit so‘zlar: gastrulyatsiya, embrional rivojlanish, ektoderma, mezoderma, endoderma, invaginatsiya, epiboliya, involyutsiya, lansetnik, baliqlar, qushlar, sut emizuvchilar, blastodisk, morfogenez, hujayra migratsiyasi, ontogenez, differensiyalanish.Abstract
Annotatsiya: Mazkur maqolada gastrulyatsiya jarayoni, uning asosiy turlari
hamda turli hayvonlar — xususan, lansetnik, baliqlar, qushlar va sut emizuvchilarda
kechadigan gastrulyatsiya jarayonlarining o‘ziga xos xususiyatlari tahlil qilinadi.
Gastrulyatsiya embrional rivojlanishning muhim bosqichi bo‘lib, unda uchta asosiy
urug‘ qavati — ektoderma, mezoderma va endoderma shakllanadi. Lansetnikda
gastrulyatsiya oddiy invaginatsiya orqali kechsa, baliqlarda epiboliya va involyutsiya
jarayonlari ustunlik qiladi. Qushlarda blastodisk tuzilishi tufayli murakkab
morfogenetik harakatlar kuzatiladi, sut emizuvchilarda esa gastrulyatsiya
implantatsiya bilan chambarchas bog‘liq holda rivojlanadi. Ushbu jarayonlarning
evolyutsion va funksional ahamiyati ilmiy asosda yoritib berilgan.
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