Yuav ua li cas thaum Blastulation?
Yuav ua li cas thaum Blastulation?

Video: Yuav ua li cas thaum Blastulation?

Video: Yuav ua li cas thaum Blastulation?
Video: Yuav ua li cas By Nhia Lor [full version] 2024, Kaum ib hlis
Anonim

Qhov txheej txheem ntawm cell faib uas tshwm sim tom qab fertilization yog hu ua cleavage. Cleavage ua rau tsim ib lub pob hollow ntawm cov hlwb hu ua a blastula . Cov blastula yuav hloov mus ntxiv thaum txheej txheem hu ua gastrulation, uas npaj peb hom ntaub so ntswg tseem ceeb ntawm cov kab mob tsim.

Ua li no, yuav ua li cas tshwm sim hauv blastula theem?

Hauv cov tsiaj txhu, cov blastula tsim cov blastocyst tom ntej theem ntawm kev loj hlob. Ntawm no cov cell hauv lub blastula Npaj lawv tus kheej nyob rau hauv ob txheej: sab hauv cell loj thiab ib txheej txheej hu ua trophoblast. Sab hauv cell loj kuj hu ua embryoblast; Qhov loj ntawm cov cell no yuav mus rau tsim lub embryo.

Tsis tas li ntawd, yuav ua li cas tshwm sim thaum gastrulation? Gastrulation : Kev tsim ntawm peb txheej txheej kab mob tseem ceeb tshwm sim thaum thawj ob lub lis piam ntawm kev loj hlob. Gastrulation yuav siv qhov chaw tom qab cleavage thiab tsim ntawm blastula thiab primitive streak. Nws yog ua raws los ntawm organogenesis, thaum ib tug neeg lub cev tsim nyob rau hauv lub tshiab-tsim kab mob khaubncaws sab nraud povtseg.

Ib yam li ntawd, lub hom phiaj ntawm Blastulation yog dab tsi?

Blastula , hollow sphere ntawm cov hlwb, los yog blastomeres, tsim thaum lub sij hawm kev loj hlob ntawm lub embryo los ntawm rov cleavage ntawm ib tug fertilized qe. Cov cell blastula tsim ib txheej txheej epithelial (npog), hu ua blastoderm, enclosing ib cov kua dej puv kab noj hniav, blastocoel.

Dab tsi yog gastrulation thiab Blastulation?

Gastrulation tshwm sim thaum a blastula , ua los ntawm ib txheej, folds sab hauv thiab loj los tsim ib gastrula . Gastrulation yog ua raws los ntawm organogenesis, thaum ib tug neeg lub cev tsim nyob rau hauv lub tshiab tsim kab mob khaubncaws sab nraud povtseg. Txhua txheej ua rau muaj cov ntaub so ntswg tshwj xeeb thiab cov kab mob hauv lub embryo tsim.

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