Spermatogenesis kunye ne-oogenesis

I-Spermatogenesis kunye ne-oogenesis yinkqubo phantsi kwayo apho ukubunjwa, ukukhula kunye nokukhula komzimba kweeseli zesini kunye namadoda wesini kwenzeka, ngokulandelanayo. Zombini ezi zinto zifana nokufana okufanayo. Kodwa, nangona kunjalo, kukho ukungafani. Masiqwalasele ngokuthe kratya kwiimpawu ze-spermatogenesis kunye ne-oogenesis kwaye zibala.

Ziziphi izinto ezifana ne-oogenesis kunye ne-spermatogenesis?

Okokuqala, kufuneka kuqatshelwe ukuba zombini iinkqubo zedatha zinamanyathelo afanayo. Cinga ngabo:

1. Isalathiso sokuzala. Kule nqanaba, iiseli eziphambili ze-spermatogonia kunye ne-oogonia ziqala ukuhlula ngokuthe ngcembe nge-mitosis. Kufuneka kuqatshelwe le nkalo kweli nqanaba: kumadoda, ukuzaliswa kweeseli zesini kwenzeka kuyo yonke impilo (ukususela ngexesha lokukhula ), kwaye kwabasetyhini kule nqanaba kuqhubeka kwinqanaba lokuphuhliswa kwamanyam (iinyanga ezi-2-5 zophuhliso lomntwana).
2. Isigaba sokukhula. Kukho ukwanda okomeleleyo kwiseli yesini ngobukhulu. Ngenxa yoko, bajika kwi-spermatocytes kunye ne-oocytes yomyalelo wokuqala. Kule meko, ii-oocytes zikhulu ngobukhulu kuba ziqokelela ezinye izondlo eziyimfuneko ekuphuhlisweni kwembungu emva kokucoca i-oocyte.
3. Isigaba sokukhula. Eyayifumene nendima ye-meiosis 1 kunye ne-meiosis 2. Ngenxa yesahlulo sokuqala, i-spermatocytes kunye ne-oocytes ifom i-2 imiyalelo, kwaye emva kweeyayi ezivuthiweyo kunye ne-spermatids. Kubalulekile ukusho ukuba enye i-spermatocyte ye-oda 1 emva kohlulo inika ama-spermatids ama-4, kwaye ivela kwi-oocyte ye-1 umyalelo weqanda elinye kunye ne-3 polar corpuscles.

Ziziphi iintlobo ezahlukeneyo kwi-oogenesis kunye ne-spermatogenesis?

Ukuthabatha umlinganiselo othelekiso we-oogenesis kunye ne-spermatogenesis, kuyimfuneko ukuthetha ukuba ukungafani kwale nkqubo kukungabikho kwi-ovogenesis yezigaba ezine zokwakha. Kuphela kuphela izilwanyana ezenza inguqu kwi-spermatozoa. Ukwakhiwa kwezi ntlobano zesini kuqala kuphela ngokuqalisa ukutshatyalaliswa kwamantombazana.

Yonke imithetho ekhankanywe ngasentla ye-spermatogenesis kunye ne-oogenesis inentsingiselo yazo. Ngaloo ndlela, umzekelo, ukuhlukana okungafaniyo kweeseli zesini ngexesha le-oogenesis kukhuthaza ukusekwa kweqanda elilodwa kuphela elinokutya kwezondlo.

Kwakhona, inyaniso yokuba i-spermatozoa yenziwa ngaphezulu kakhulu ngenxa yokuba xa iqanda lizaliswa, i-1 yesini yesini isini ifinyelela. Abanye bafa endleleni eya ku-ovum.

Sinikeza umfanekiso wesibonakaliso wokuqonda okungcono iinkqubo ze-spermatogenesis kunye ne-oogenesis, apho iingongoma eziphambili zazo ziboniswa.