Fertilization yog txheej txheem zoo kawg nkaus

Cov txheej txheem:

Fertilization yog txheej txheem zoo kawg nkaus
Fertilization yog txheej txheem zoo kawg nkaus

Video: Fertilization yog txheej txheem zoo kawg nkaus

Video: Fertilization yog txheej txheem zoo kawg nkaus
Video: qaib zuav ceg yog vim li cas thiab yuav ua li cas? 2024, Hlis ntuj nqeg
Anonim

Fertilization yog txheej txheem uas yog kev sib xyaw ntawm cov txiv neej thiab poj niam cov hlwb. Nws yuav zoo li tsis muaj dab tsi nyuaj rau nws, tab sis qhov tseeb qhov xwm txheej txawv me ntsis. Fertilization tsis yog txheej txheem ib zaug.

Fertilization yog
Fertilization yog

Dab tsi yog cov yam ntxwv ntawm cov kab mob, thiab vim li cas lawv thiaj xav tau?

Poj niam gametes hu ua qe. Lawv yog cov loj loj thaum piv nrog lwm cov cell. Nyob rau tib lub sij hawm, oddly txaus, tab sis nyob rau hauv cov nqe lus ntawm tus nqi ntawm cov genetic khoom, xws li ib tug cell poob ob zaug ntau npaum li cov pa autosomes (tsis yog kab mob hlwb). Qhov no yog vim lub fact tias qe yog tsim los ntawm meiosis, thiab tsis mitosis, zoo li tus so. Xws li cov txheej txheem rau kev tsim gametes tsuas yog tsim nyog, vim qhov no tso cai rau kev sib xyaw ntawm cov txiv neej thiab poj niam cov kab mob hlwb los muab cov txheej txheem diploid (ob npaug) ntawm chromosomes. Yog li yav tom ntej tus me nyuam tau txais cov cim los ntawm leej txiv thiab leej niam.

Tom qab fertilization
Tom qab fertilization

qe thiab phev "tshaj" li cas?

Txiv neej thiab poj niam cov qe menyuam me me heev. Feem ntau lawv pom ib leeg nyob rau hauv lub ampullar ib feem ntawm cov hlab ntsha fallopian. Qhov teeb meem tsis yooj yim li nws yuav zoo lixub glance. Qhov no yog vim lub fact tias, nyob rau hauv kev sib piv nrog rau lub lumen ntawm lub fallopian hlab, qhov loj ntawm cov kab mob yog negligible. Nws yog vim li no thiaj li xav tau ib lub tswv yim kom lub qe thiab cov phev tuaj yeem sib pom. Nws yog hu ua "chemotaxis" (kev taw qhia txav). Ua tsaug rau nws, fertilization ntawm tes nrog ib tug txiv neej gamete yog qhov yooj yim.

Yuav ua li cas tom qab fertilization?

Tom qab cov phev thiab qe sib koom ua ib lub zygote, kev loj hlob ntawm lub embryo pib. Nyob rau hauv lub neej yav tom ntej, zygote maj mam txav los ntawm cov hlab ntsha thiab tom qab 7-10 hnub nkag mus rau hauv lub tsev menyuam. Nyob ntawd, lub embryo yog nkag mus rau hauv nws phab ntsa thiab pib tau txais kev noj haus los ntawm leej niam lub cev. Nyob rau ob peb lub lis piam tom ntej no, nws tseem tsis tau tsim thiab nce qhov loj me me me. Maj mam, lub cev tau muab faib ua 3 cov ntaub so ntswg - mesoderm, ectoderm thiab endoderm. Txhua tus ntawm lawv yog koom nrog hauv kev tsim ntawm ntau yam kabmob ntawm lub embryo. Thaum lub sij hawm no, nws yog ib qho tseem ceeb heev tsis txhob ua phem rau cov kab mob nyob rau hauv ib txoj kev, vim hais tias qhov no yuav ua rau muaj teeb meem loj nyob rau hauv nws tsim. Yog li fertilization yog txheej txheem nyuaj heev, tab sis yuav ua li cas tom ntej no tseem ceeb dua.

Cell fertilization
Cell fertilization

Thaum conception nyuaj?

Ntau yam yuav tsum ua kom tau raws li kev ua tiav fertilization tshwm sim. Qhov no tseem ceeb heev kom paub. Niaj hnub no, ib qho ntawm cov teeb meem tshwm sim feem ntau yog kev cuam tshuam ntawm cov hlab ntsha fallopian. Nrog rau qhov no pathologyfertilization ua tsis tau. Qhov no yog vim qhov tseeb tias cov phev tsuas yog tsis tuaj yeem nkag mus rau lub qe.

Tsis tas li nyob rau xyoo tas los no, tau muaj qhov txo qis ntawm cov kab mob hauv cov phev thiab txo qis hauv nws cov ntim tag nrho. Tag nrho cov no ua rau muaj qhov tseeb tias tsuas muaj tsawg tus spermatozoa mus txog lub ampulla ntawm cov hlab ntsha.

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