I-germ cell ye-germ

Iseli lesisu lokuzala, elibizwa ngeqanda, liyisakhiwo esincane esivela nxazonke, lapho kubonakala khona ukusabalalisa okufanayo kwe-vitelline inclusions. Ngaphandle, iseli lesisu lokubeletha, i-gamete efanayo, limbozwe igobolondo elimnyama futhi lizungezwe ungqimba lwamangqamuzana e-follicular enza umsebenzi wokudla okunomsoco. Ngaphezu kwalokho, baphinde badlale indima yohlobo oluyisivimbela, ngakho-ke bavame ukwenza umsebenzi wokuzivikela.

Yiziphi izici zenqubo yokwakhiwa kwamaseli wesini wesifazane?

Iqanda, elingaphansi komjikelezo, libizwa ngokuthi i-oocyte. Wonke amangqamuzana ocansi ahlukaniswe yi-meiosis. Kumele kuqashelwe ukuthi esigabeni sokuhlukaniswa kwamaseli ocansi kunezici ezithile. Ngakho-ke ikakhulukazi esigabeni sokuqala sokuhlukanisa iqanda lilibalekile ekuthuthukiseni, ngenkathi likhula ngobukhulu.

Kwabesifazane, ngisho nasesiteji sokuthuthukiswa kwe-intrauterine, kusuka ku-oogonia - amangqamuzana e-sex primary, kuhlanganiswa ama-oocyte wezigidi eziningana. Kumele uqaphele ukuthi isikhathi esithile ngaphambi kokuzalwa kwamantombazane ama-oocyte ashintshwa abe yi-follicles, njll. ukuzungezile kwakha igobolondo, okukhulunywe ngenhla.

Zonke izinhlanzi ezikhulayo ziyaqhubeka zikhula futhi ekugcineni ziyohlaziya noma zikhulule ama-oocyte aphakathi kwazo. Kumele kuqashelwe ukuthi kumuntu wokuvuthwa kwe-oocyte kwenzeka kuphela lapho kuqala ukukhulelwa. Ngakho-ke, kungashiwo ukuthi amangqamuzana omzimba wesifazane avuthiwe emaqanda ama -ovari, noma kunalokho ku-follicles.

Yiziphi izici zenqubo yokuvuthwa kwamaseli wesini wesifazane?

Ngesikhathi sokuvuthwa, i-oocyte eyinhloko ihlukana ngokwe-meiosis, okwenza kube nokwakhiwa kwe-oocyte yesibili, okudlulele kakhulu kumuntu owedlule ngosayizi. Kulesi simo, lesi selli sinayo i-haploid, isb. isethi sehafu yezinto ze-chromosomal, ene-yolk ngaphezulu kune-oocyte eyinhloko.

Emva kokuvuthwa kwamaseli wesini wesifazane sekuphelile, i-vial, ekhonjelwe ngaphansi kwesembozo se-epithelium ye-gland ngokwayo, i-ovary, iphukile. Emva kwalokho, i-oocyte yesibili ishiya ngqo emgodini wesisu (inqubo ye-ovulatory), lapho ithunjwa khona yi-cilia esesibhukwini sezintambo, ifinyelela emgodini we-fallopian.

Yimiphi imisebenzi esemqoka yamaseli wesini wesifazane?

Njengoba sibhekene negama lesisini selesilili sesifazane, sesihlolisise isakhiwo salo, kubalulekile ukusho ngokubaluleka kwalo. Ngakho-ke, phakathi komsebenzi wamaqanda, kubalulekile ukubiza igama:

• ukubeletha - i-fetus yenziwa kusukela eqanda elikhuliswe;
• ukugcinwa nokudluliswa kolwazi lofuzo.