Iveki ye-3 yokukhulelwa

Siyaqhubeka nesikhethekileyo «Iveki yokukhulelwa ngeVeki»: emva iveki 1 y 2, siza kuchumisa. Enye yeenkqubo ezimangalisayo nezinomdla kwindalo ngokungathandabuzekiyo kukuchumisa. Ngaphaya komfanekiso oqhelekileyo womanyano phakathi kweqanda kunye nesidoda, uya kuthanda ukwazi ukuba le nkqubo ibandakanya uthotho lwamanyathelo amangalisayo esingazange sixelelwe ngawo eklasini, kwaye “Madres Hoy” sifuna ukukutyhilela.

Sikuloo mdaniso weekhemikhali ugqibeleleyo apho iiseli ezimbini zesini okanye iigethithi ziya kutshintshisa ii-chromosomes zazo, kodwa hayi ngaphambi kokwenza olona hlanga lubalaseleyo nolunobuchule apho isidoda esinye siya kufikelela kweloqanda. Okwenzekayo ngokulandelayo kunemfihlakalo enkulu kunye nomceli mngeni kwisayensi, Apho apho iiseli ezimbini ezincinci zinikezela kuthotho lweenguqu ukuchaza kancinci into esiyibiza ngokuba "bubomi". Siyakucacisela.

Inyathelo lokuchumisa ngenyathelo

Ubusazi ukuba iqanda lingaphezulu nje kwe-0.135 ml ubukhulu? Isidoda sincinci, kwaye enyanisweni, kunokubakho phakathi kwe-120 kunye ne-600 yezigidi zesidoda kwi-ejaculation nganye. Ngoku, kodwa phakathi kwabo bonke, malunga ne-500 kuphela eya kuthi ifikelele kweso sigaba apho ukuchumisa kuyakwenzeka khona.

Masibone isigaba ngasinye salo.

Uhambo olude luyaqala.

Olu lonwabo luqala xa amadlozi efakwa kwilungu lobufazi. Le ndawo ayisiyondawo imnandi, ine-asidi kakhulu kwaye ke isidoda siyanyanzelwa ukuba sifune indawo enealkali ngakumbi, ngaloo ndlela sidlula isibeleko ukuya kwimibhobho yesibeleko kwiiyure ezimbalwa.

Kanye kwimibhobho yesibeleko, isidoda sinokuphila kangangeeyure ezingama-48 ukuya kwezingama-72. Ke, ukuchumisa kunokwenzeka phakathi kweentsuku ezimbini okanye ezintathu emva kokuba neentlobano zesini.

Kule khosi apho indawo enkulu kwezi zigidi zobudoda ilahlekile, inciphisa abo bambalwa banethamsanqa abaya kungena ngenwebu
weqanda ukunika indlela yokuchumisa.

Ngexesha lolu hambo isidoda sishiya ilahleko eyinxalenye yoludwe lweentloko zazo.. Oku kungenxa yesizathu esibalulekileyo sokufuna ukwazi: ukuze kuthintelwe ukuphendula kweekhemikhali kubalulekile ukugqobhoza i-ovule.

Ukungena kwesithsaba esikhanyayo

Ukuyiqonda ngcono amanqanaba okuchumisa dKufuneka sicinge i-ovule njengendidi yecapsule ekhuselweyo ngokulandelelana ngamanqanaba ahlukeneyo. Enye yazo, eyona nto ingaphandle yangaphandle sisithsaba esikhanyayo okanye esikhanyayo.

Isithsaba esikhanyayo senziwe ngamanqanaba aliqela anomsebenzi wokubonelela ngeeproteni kwiqanda.
Isidoda sifika apha ukuza kuqalisa ukuqhubela phambili okunobunzima kuzo zonke iiseli zelungu ejikeleze olu lwakhiwo. Benza oko ngenxa yohlobo lwe-enzyme ebavumela ukuba bavule iitonela ezahlukeneyo. Kunzima kakhulu!

Ukufika kwi-zona pellucida

Isidoda sele sidlulile kwi-corona radiata kwaye ngoku sikwi isithintelo sesibini ekufuneka bewele kuso. Baya kwenza umbulelo kuhlobo lwe-enzyme eya kuthi ivelise utshintsho kwisidoda ngokwaso, sibangele into eyaziwa ngokuba yi-acrosome reaction.

Kule nqanaba, ayizizo zonke isidoda eziya kuthi zisabele ngale ndlela. Eyona njongo iphambili kukuba uhlobo oluthile lwesakhiwo luvele: the intambo ye-acrosomic- Yinjongo yayo? Ilula kakhulu, nxibelelana nenwebu yeseli yeqanda. Inyathelo lokugqibela ...

Ukuhlanganiswa

Nangona kuphela isidoda esincinci esifikelele kwi-zona pellucida, eli dabi lokusinda kunye neempendulo ze-enzymatic ziya kuvumela ithamsanqa ukuba libe linye kuphela, leyo enokuthi ekugqibeleni idibane ne-plasma membrane ye-oocyte enkosi kwi-acrosomal filament. Xa oku kusenzeka, kuthotho lweenguqu ezinomdla eziqaliswayo:

Iimbumba ziqala ukudibanisa ngotshintsho olwahlukileyo lwe-ionic apho ukubambelela kwesidoda kwi-oocyte kuthintelwe.

Umnxeba uyavela ikhowuni yokuchumisa, Injongo yayo kukuvumela intloko, isiqwenga esiphakathi kunye nomsila wesidoda ukuba ungene kwi-oocyte cytoplasm.

Ukuchumisa kwenzeka xa i-nuclei fuseZombini intloko yesidoda eye yafikelela kwiqanda nakwiqanda ngokwalo. Kulapho ke iyonke i-chromosomes ezingama-46 zidibene khona (iseli nganye yesini inegalelo elingama-23), yiyo loo nto kubunjwe isiphiwo esimangalisayo somntu omtsha.

Nangona kuyinyani ukuba isiqingatha solwazi lwemfuzo sihambelana notata nomama, lUmanyano luyila Ukudalwa komntu owahlukileyo nongaphindwayo, ethi ngeli xesha ibizwa ngokuba yi-zygote kwaye emva kweenyanga ezisithoba zotshintsho, ukukhula kunye nemimangaliso eyimfihlo esiza kuyichaza kumanqaku alandelayo, kuya kunika indlela entsha.

Ividiyo elandelayo Kuyakukunceda ukwazi okungakumbi malunga nokumangalisa kokuchumisa:

Siyakumema ukuba uqaphele ukuba ufumane inqanaba elilandelayo lokukhulelwa ngenyathelo ngenyathelo ...