Lub qe pib nws tsib hnub taug kev los ntawm qhov nqaim, hollow qauv hu ua lub raj xaum mus rau lub tsev menyuam. Raws li lub qe tab tom taug kev los ntawm txoj hlab pas, theem ntawm progesterone, lwm yam tshuaj hormones, nce, uas pab npaj lub tsev menyuam hauv plab rau cev xeeb tub.
Tus qauv blastocyst yog dab tsi uas dhau los ua lub embryo?
Lub blastocyst muaj ib lub xovtooj sab hauv (ICM), lossis embryoblast, uas tom qab tsim lub embryo, thiab txheej txheej ntawm cov hlwb, lossis trophoblast, uas tom qab tsim cov placenta.. Lub trophoblast nyob ib ncig ntawm lub cell loj thiab cov kua dej puv, blastocyst kab noj hniav hu ua blastocoele lossis blastocystic kab noj hniav.
Yuav ua li cas lub blastocyst tsim?
Nyob rau hauv tib neeg, blastocyst tsim pib kwv yees li 5 hnub tom qab fertilization thaum cov kua dej puv kab noj hniav qhib rau hauv morula, theem pib embryonic ntawm ib pob ntawm 16 hlwb. Lub blastocyst muaj ib txoj kab uas hla ntawm 0.1-0.2 hli thiab muaj 200-300 hlwb tom qab cleavage sai (cell division).
fertilized ovum hu ua ua ntej nws pib cleavage?
A zygote kev faib cov cell sai sai ( cleavage ) los ua a spherical pob ntawm cov hlwb: lub blastula; qhov no yuav txhim kho ntxiv mus rau a blastocyst.
Qhov twg hauv qab no yog qhov tseeb ntawm cov qauvkoob yuav tsum mus sau cov kua amniotic?
Amniotic kua yog sau los ntawm kev ntxig ib rab koob rau hauv niam lub plab. Sau cov qauv uas rab koob yuav tsum mus los mus sau cov kua amniotic.daim tawv nqaij thiab hypodermis, plab zom mov cov leeg nqaij, tsev menyuam, placenta.
