txheej ntawm cov hlwb, hu ua hypoblast, nruab nrab ntawm lub xov tooj ntawm tes sab hauv lub cell loj Anatomical terminology. Nyob rau hauv thaum ntxov embryogenesis ntawm feem ntau eutherian mammals, lub puab cell loj (ICM; kuj hu ua lub embryoblast los yog pluriblast) yog cov cell hauv lub primordial embryouas nws thiaj li yuav ua rau kom meej meej. cov qauv ntawm lub fetus. https://en.wikipedia.org › wiki › Inner_cell_mass
Inner cell mass - Wikipedia
thiab kab noj hniav. Cov hlwb no pab tsim cov embryonic endoderm, los ntawm qhov ua rau ua pa thiab plab zom mov.
Yuav ua li cas rau qhov hypoblast?
Lub hypoblast muab nce mus rau thawj thiab theem nrab yolk hnab thiab extraembryonic mesoderm. Cov tom kawg splits, tsim cov kab noj hniav chorionic. Lub epiblast ua rau lub embryo thiab amnion. Raws li thawj yolk sac involutes, lub thib ob yolk sac tsim.
Yuav ua li cas rau cov hlwb hypoblast thaum lub plab zom mov?
Nyob rau hauv gastrulation, cov txheej txheem nyob rau hauv uas peb txheej txheej kab mob ntawm lub trilaminar embryonic disc yog tsim, hlwb los ntawm lub epiblast migrate, ntawm lub primitive streak, mus rau sab hauv ntawm lub embryo, hauv cov txheej txheem hu ua ingression, txheej txheem uas cuam tshuam nrog cellular epithelial-to-mesenchymal hloov pauv (EMT).
Puas hypoblast form Extraembryonic mesoderm?
Kev loj hlob ntawm Embryonic ntawm ExtraembryonicMesoderm:
Lub extraembryonic mesoderm nyob rau hauv tib neeg embryos ntseeg tau tsim los ntawm hypoblast (txawm hais tias qhov kev pab cuam trophoblast kuj yog plausible), thaum nyob hauv nas, nws tshwm sim los ntawm caudal kawg ntawm lub primitive streak.
Yuav ua li cas rau Extraembryonic mesoderm?
Lub extraembryonic mesoderm proliferates rau kab ob qho tib si Heuser's membrane (ua thawj yolksac) thiab cytotrophoblast (ua lub chorion). Lub extraembryonic reticulum tom qab ntawd tawg thiab hloov los ntawm cov kua dej uas muaj kab noj hniav, cov kab noj hniav chorionic.
