Ziziphi iinguqu apho iqanda lingena kumjikelezo wesisu?
Njengoko kuyaziwa, iiseli zesini kubasetyhini zenziwa kwinqanaba lophuhliso lwe-intrauterine. Inyanga zonke, ngokuqala kokukhulelwa, iqanda liye lishiye ulandelelwano lwesilwanyana. Ngokuqhelekileyo umjikelezo omnye kwisisu esiswini singaya kumaqanda ama-2-3.
Ngokuphathelele isakhiwo sangaphandle, i-ovum yowesifazane ibonakala njengento encinci eyenziwe nge-anatomical form. Ngaphandle lihlanganiswe negobolondo elixubileyo, elikhusela okuphakathi kunye nomxholo ovela kwimpembelelo engaphandle.
Xa emzimbeni wowesifazane kukho inqubo enjalo njenge-ovulation, iqanda likhula kancane kwaye lijonge "livule". Oku kunciphisa igobolondo yangaphandle. Oku kuyimfuneko ukwenzela ukwandisa ukunyameka kwebhubhane kwiintsholongwane zentsholongwane ngexesha lochumiso.
Ukuba ixesha lezesondo lihambelana ne-ovulation, ithuba lokukhulelwa lukhulu . Emva koko, ukubonakala kweseli yesini yesini iguquka. Iqanda elichumayo libukeka lifana nelokuqala, kodwa i-membrane yangaphandle iphinde ihlanganiswe. Ngethuba elifanayo, ngaphakathi kweseli ngokwayo, kunokwenzeka ukubona i-nuclei (1 kwi-spermatozoon) usebenzisa i-microscope ye-electron, edibanisa kwaye iqale ukwahlula.
Kwenzeka ntoni kwiqanda emva kokuvuthwa?
Ukuba ukuchumisa akunakwenzeka, ngoko ngokwenene ngosuku emva kokukhululwa kweqanda. Zonke i-organelles zayo, kunye neembrane, ziyaphuma, zixutywe negazi lokuya esikhathini kunye neengqungquthela ze-endometrium ye-uterine. Ngoko ke, ukuba sithetha ngendlela iqanda libukeka ngayo ngeenyanga, kuyafuneka kuqatshelwe ukuba ngoku, ngoku kunjalo, akusekho. Nangona kunjalo, ngexesha elifanayo kwiiyunithi intsha i-germ cell-ripens ngaphakathi kwintollicle, ngokunyuka kwanda ngobukhulu.