Lub epiblast ua rau muaj peb txheej txheej kab mob tseem ceeb (ectoderm, qhov tseeb endoderm, thiab mesoderm) thiab mus rau extraembryonic mesoderm ntawm visceral yolk sac, allantois, thiab cov amnion.
Epiblast cells ua dab tsi?
Cov hlwb epiblast uas nyob ib sab ntawm trophoblast tau teev tseg kom dhau los ua amnion cells. Tus nas epiblast hloov los ntawm rosette qauv mus rau lub khob. Cov ntaub ntawv pro-amniotic kab noj hniav, ncig los ntawm lub khob epiblast fused rau extraembryonic ectoderm.
Yuav ua li cas yog lub hypoblast ua?
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.
Endoderm ua dab tsi?
Endoderm cells ua rau qee lub cev, ntawm lawv txoj hnyuv, plab, plab hnyuv, ntsws, siab, thiab txiav txiav Lub ectoderm, ntawm qhov tod tes, nws thiaj li tsim tau qee yam "sab nrauv" ntawm lub cev, suav nrog cov epidermis (sab nrauv ntawm daim tawv nqaij) thiab plaub hau.
Puas lub embryoblast ua tus epiblast?
Ua ntej cog, cov hlwb hauv lub embryoblast pib sib txawv ua ob txheej - epiblast (primary ectoderm), thiab ib txheej sab hauv ntawm cov hlwb hu ua hypoblast (los yog thawj endoderm).
