Cov tsos mob ntawm oocyte fertilization

Tam sim ntawd tom qab fertilization, ib tug txheej txheem intensive pib - lub crushing ntawm lub qe. Ob lub hlwb tig mus rau plaub, ces lawv ua yim, tom qab ob peb lub asthiv lawv ua ib lub embryo. Nws twb tau tso lub ntsiab nruab nrog cev, thiab nyob rau hauv 9 lub hlis nws yuav dhau los ua ib tus me nyuam mos liab.

Ntev npaum li cas lub qe fertilize?

Tus txheej txheem ntawm fertilization ntawm lub qe kav tsuas yog ob peb teev. Cov kab mob kis tau los ntawm cov txheej txheem ntawm epithelium, uas nyob ib ncig ntawm lub qe, nkag mus rau hauv nws lub plhaub thiab ncav lub nucleus. Nyob rau hauv tus txheej txheem ntawm fertilization, cov phev siv tshwj xeeb enzymes uas nyob rau hauv kawg ntawm lub taub hau, uas pab kom kov yeej kev tiv thaiv kev tiv thaiv. Tom qab qhov no, cov qe yog tsis muaj rau lwm yam tshuaj tua kabmob (spermatozoa).

Oocyte division

Raws li ib tug ntawm fusion ntawm ovum thiab cov phev los ntawm fertilized qe, ib zygote tsim, thawj theem ntawm kev loj hlob ntawm lub embryo. Tsis pub dhau 24 teev tom ntej no, nws yuav yog ib yam kabmob unicellular uas yuav maj mam pib mus ua rau hauv cov qauv nyuaj. Nyob rau hauv lub zygote, tus txheej txheem ntawm tsim ntawm nuclei (txiv neej thiab poj niam) yog nquag muaj raws li nram no. Txhua yam ntawm cov nuclei tau nws tus kheej cov txheej chromosomes - txiv neej thiab poj niam. Lub nuclei yog tsim ntawm ntau qhov xaus ntawm lub zygote, lawv nyiam rau txhua lwm yam, lub shells dissolve thiab crushing pib.

Tus ntxhais hlwb tsim los ntawm kev faib ua me dua, lawv muaj nyob hauv tib lub plhaub, thiab tsis sib cuam tshuam nrog txhua lwm yam. Lub sijhawm no kav ntev txog peb hnub. Tom qab lwm hnub, cov qog tsim ib qho blastocyst, uas muaj 30 lub hlwb. Qhov no yog thawj theem ntawm kev loj hlob ntawm lub plab hnyuv qe, hollow pob nrog ib embryoblast nrog ib lub phab ntsa - ib tus me nyuam yav tom ntej. Blastocyst yog npaj txhij rau implantation nyob rau hauv lub epithelium ntawm uterus.

Cov tsos mob ntawm oocyte fertilization

Fertilization tshwm sim nyob rau ntawm qib cellular, thiab yog li ntawd yog pom tsis tau tus poj niam. Tias yog vim li cas nws tsis yooj yim rau kev paub qhov txawv cov tsos mob rau lub fertilization ntawm ib lub qe. Thawj cov cim qhia tias muaj menyuam hauv plab muaj peev xwm ua tau zoo tom qab lub qe qe menyuam mus rau lub uterine kab noj, thiab qhov no yuav tshwm sim, ntawm qhov nruab nrab, 7 hnub tom qab fusion ntawm cov phev thiab qe. Lub sijhawm no yuav qhia tau tias yog me ntsis los ntshav, uas yog ib tug poj niam tuaj yeem ua rau lub cev pib. Tsis tas li ntawd, tam sim ntawd tom qab txuas lub qe nyob rau hauv lub cev, lub keeb kwm pib hormonal hloov, thiab ces thawj cov cim ntawm cev xeeb tub pib tshwm. Feem ntau qhov no tshwm sim tsis dhau tshaj li ntawm 1.5-2 lub lis piam tom qab cog qoob loo.

Vim li cas tsis yog lub qe fertilized?

Qee zaum, txawm tias cov qe menyuam thiab phev sib ntsib, muaj kev ua txhaum ntawm kev xav. Piv txwv, nws yuav tshwm sim tau tias ib qho unforted oocyte nrhiav tau tam sim ntawd nrog ob tug spermatozoa, uas tshwm sim ntawm kev tsim ntawm ib qho tsis sib haum xeeb triploid embryo uas tuag nyob rau hauv ob peb hnub. Yog tias zoo li lub embryo txuas nrog rau epithelium ntawm lub tsev menyuam, kev xeeb tub yuav raug cuam tshuam tau thaum lub sij hawm ntxov tau. Tsis tas li ntawd, lub qe tsis tau fertilized raws li ib tug tshwm sim ntawm qhov tseeb hais tias spermatozoa tsis ncav lub hlab plawv hlab. Piv txwv li, lawv yog cov me me hauv phev, thiab qhov chaw ntawm qhov chaw mos thiab lub tsev menyuam, nrog rau cov hnoos qeev ncauj tsev menyuam, yog kev txhoj puab heev rau cov kab mob hauv spermatozoa. Kev ua txhaum ntawm kev xav yuav tshwm sim los ntawm kev puas tsuaj rau lub qe nws tus kheej.

Nyob rau hauv txhua rooj plaub, los teb cov lus nug txog vim li cas tsis muaj menyuam hauv plab, tsuas yog tus kws kho mob ua tom qab kuaj xyuas tag nrho, vim muaj ntau yam sib txawv rau cov phev thiab qe tsim nyog ua rau lub cev tuaj yeem ua ke.