Dab tsi yog txhais los ntawm Blastulation?
Dab tsi yog txhais los ntawm Blastulation?

Video: Dab tsi yog txhais los ntawm Blastulation?

Video: Dab tsi yog txhais los ntawm Blastulation?
Video: Kev Hlub Tsis Yog Thawj Tug Daim 34 Hmoob 3D 2024, Kaum ib hlis
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Blastulation yog cov txheej txheem tom qab lub morula thiab precedes lub gastrulation. Nws entails cleavage uas ua rau a blastula muaj li ntawm 128 hlwb. Nws yog cim los ntawm lub xub ntiag ntawm blastocoel. Lo lus keeb kwm: los ntawm Greek (blastos), lub ntsiab lus “sprout” Saib ntxiv: blastula.

Ua li no, dab tsi yog qhov txheej txheem ntawm Blastulation?

Blastulation yog kev tsim ntawm a blastula los ntawm morula. Lub morula yog ib qho embryo puv nrog cov hlwb (blastomeres), tab sis cov blastula muaj cov kua dej hu ua blastocoel. Thaum blastulation , cov hlwb txuas ntxiv faib thiab pib sib txawv.

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.

Kuj Paub, Blastulation thiab gastrulation yog dab tsi?

Cov Blastula yog ib tug kheej kheej, hollow, ib tug celled tuab qauv, pom nyob rau hauv thawj theem ntawm embryogenesis, thiab yog hu ua 'pre-embryo'. Cov gastrula yog tsim thaum lub sij hawm gastrulation theem ntawm embryogenesis, thiab muaj peb txheej kab mob, nrog cov qauv hu ua 'mature-embryo'.

Lub 8 cell embryo hu ua dab tsi?

8 - Cell embryo (Mrl) Ua 8 cev theem (ua tau muaj 6-12 hlwb ) tsim los ntawm hnub 3 ntawm tib neeg embryo kev txhim kho, thiab suav nrog kev txuas ntxiv ntawm cov txheej txheem ntawm embryo genome activation (uas yog pib ntawm 4- 8 - cell theem ntawm tib neeg embryo ), ua rau lub morula. Nyeem Tsawg.

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