Blastocoel yog ib yam khoom ntawm embryogenesis uas tsim thaum lub embryo tau cog rau hauv tsev menyuam. Tom qab 30 feeb ntawm kev tsim ntawm zygote 1st cleavage tshwm sim (ntsug). Tom qab 30 feeb tom ntej. lwm qhov cleavage tshwm sim (kab rov tav / transverse).
Blastocoel tsim theem twg?
Nws tsim thaum lub sijhawm embryogenesis, raws li qhov tau hais tias " Thib Peb"tom qab ib leeg-celled fertilized oocyte (zygote, ovum) tau muab faib ua 16-32 hlwb, ntawm tus txheej txheem ntawm mitosis.
blastocoel yog dab tsi thiab thaum nws tsim?
Definition. Lub primordial, cov kua dej puv hauv kab noj hniav thaum ntxov ntawm embryo, piv txwv li. ntawm blastula. Ntxiv. Lub xub ntiag ntawm kab noj hniav no qhia tau hais tias lub embryo nyob rau hauv blastula theem tom qab morula.
Thaum blastocoel tsim nyob rau hauv lub embryo hu ua?
Teb: Ib qho amphibian embryo nyob rau hauv 128- cell theem yog suav tias yogblastulavim tias blastocoel hauv lub embryo yuav tshwm sim thaum lub sijhawm no. Cov kua dej uas muaj kab noj hauv cov tsiaj hemisphere ntawm tus qav.
blastula tsim nyob rau hauv tib neeg nyob qhov twg?
Cov txheej txheem ntawm embryogenesis pib thaum qe lossis zes qe menyuam tau fertilized los ntawm cov phev cell los tsim ib lub zygote. Cov zygote no tom qab ntawd nkag mus rau kev faib tawm mitotic, txheej txheem uas tsis ua rau muaj kev loj hlob tseem ceeb tab sis tsim kom muaj ntau pawg hu ua blastula.
