Fertilization vs Implantation
Qhov sib txawv tseem ceeb ntawm fertilization thiab implantation yog tias lawv ob yog cov theem sib txawv hauv txoj kev loj hlob ntawm fetal. Nyob rau hauv tsab xov xwm no, ob txheej txheem, fertilization thiab implantation, thiab qhov txawv ntawm lawv yuav tau tham nyob rau hauv kom meej. Ob qho fertilization thiab implantation yog cov theem tseem ceeb ntawm kev loj hlob ntawm fetus los yog cev xeeb tub. Kev loj hlob tuag pib nrog lub qe fertilized (ovum) thiab xaus nrog ib tug tag nrho cov fetus. Fertilization thiab implantation yog qhov kev loj hlob thaum ntxov ntawm cov txheej txheem no. Nyob rau hauv txhua lub sij hawm, fetus yog denoted los ntawm ib tug txawv lub npe. Piv txwv li, lub sij hawm pib ntawm ovulation mus rau fertilization, nws yog hu ua ovum, whereas lub sij hawm ntawm fertilization rau implantation, lub fetus yog denoted li zygote. Fertilization tshwm sim thawj zaug tom qab cog thiab feem ntau yog ob theem ua tiav hauv thawj 8-10 hnub txij thaum pib xeeb tub.
Fertilization yog dab tsi?
Fertilization yog txheej txheem ntawm fusing txiv neej gamete, spermatozoon, nrog poj niam gamete, oocyte, los tsim cov zygote. Fertilization tshwm sim nyob rau hauv 24 teev ntawm ovulation nyob rau hauv lub ampulla, feem ntau widened ib feem ntawm lub fallopian raj. Cov txheej txheem no pib thaum cov phev nkag mus rau hauv qhov chaw mos. Thaum cov phev muab tso rau hauv qhov chaw mos, lawv tsiv los ntawm lub tsev menyuam mus rau hauv lub tsev menyuam nrog kev pab los ntawm kev txav ntawm lawv cov flagella. Cov phev tuaj yeem, feem ntau, nyob twj ywm rau ob peb hnub hauv poj niam qhov chaw mos, tab sis oocyte kav ntev txog 24 teev. Yog li, kev sib deev yuav tsum tshwm sim ntawm 3 hnub ua ntej thiab ib hnub tom qab ovulation kom muaj kev vam meej fertilization. Txawm hais tias ntau cov phev hlwb mus txog oocyte, tsuas yog ib qho yuav nkag mus rau hauv daim nyias nyias ntawm oocyte los tsim cov zygote. Thaum cov phev cell nkag mus rau hauv oocyte, qhov thib ob meiotic division tshwm sim hauv oocyte, ua rau haploid nucleus. Lub nucleus ces fuses nrog lub haploid nucleus ntawm phev cell los tsim zygote. Qhov fusion no thaum kawg ua tiav cov txheej txheem fertilization.
Teem, nyeem: Qhov txawv ntawm Sab Nraud thiab Internal Fertilization, Qhov Sib Txawv Ntawm Spermatogenesis thiab Oogenesis
Kev cog hniav yog dab tsi?
Y Implantation yog txheej txheem ntawm adhering blastocyst rau lub endometrium tom qab fertilization. Nws tshwm sim tom qab 8-10 hnub ntawm fertilization. Cov hlwb trophoblast nyob sab nraud ntawm blastocyst tuaj yeem tsim cov enzymes proteolytic uas muaj peev xwm ua kom yaj txhua cov ntaub so ntswg, uas lawv kov. Qhov kev ua no tso cai rau blastocyst nkag mus rau hauv endometrium. Implantation ua rau ntau qhov kev hloov pauv rau blastocyst, trophoblast thiab uterus. Raws li kev cuam tshuam tas mus li, blastocyst sib txawv los tsim peb cov kab mob xws li; endoderm, ectoderm thiab mesoderm. Lub trophoblast uas yog embedded nyob rau hauv lub endometrium lately tsim lub chorion thiab ib feem ntawm lub placenta. Thaum lub sij hawm implantation, lub endometrium yuav thicker, mos thiab heev vascular thiaj li yuav txhawb lub tsim embryo. Nyob rau hauv tej yam kev mob, qhov implantation, feem ntau, tshwm sim nyob rau hauv lub anterior los yog posterior phab ntsa ntawm lub tsev menyuam. Txawm li cas los xij, yog tias kev cog qoob loo tshwm sim ntawm qhov chaw ze rau ntawm lub ncauj tsev menyuam, nws yuav ua rau muaj qhov txawv txav hu ua placenta previa.
Qhov txawv ntawm Fertilization thiab Implantation yog dab tsi?
• Fertilization yog fusion ntawm txiv neej thiab poj niam gametes los tsim ib lub zygote. Implantation yog txheej txheem ntawm adhering blastocyst rau lub endometrium.
• Fertilization tshwm sim tom qab cog.
• Fertilization tshwm sim li ntawm 24 teev ntawm ovulation whereas implantation tshwm sim tom qab li 8-10 hnub ntawm fertilization.
• Fertilization xaus nrog zygote whereas implantation results implanted blastocysts with three germ layers.
• Fertilization tshwm sim nyob rau hauv qhov dav ntawm txoj hlab pas, uas nyob ze ze rau zes qe menyuam, whereas implantation tshwm sim nyob rau hauv lub endometrium ntawm lub tsev menyuam.
