Spermatogenesis uye oogenesis

Spermatogenesis uye oogenesis ndiyo nzira inoshandiswa pakuumbwa, kukura, uye kusimwa kwemasero evanhukadzi nevakadzikadzi, zvichienderana. Zvose zviri zviviri izvi zvakafanana zvakafanana mune zvakafanana. Asi, pasinei neizvi, pane kusiyana. Ngatinyatsoongororai zvinoshandiswa ne spermatogenesis uye oogenesis uye zvinozvifananidzira.

Ndezvipi kufanana kwe oogenesis uye spermatogenesis?

Kutanga, zvinofanira kuonekwa kuti zvose zviri kuitika data zvine maitiro akafanana. Chimbofunga nezvazvo:

1. Kuberekerwa. Panguva ino, masero ekutanga e spermatogonia uye oogonia anotanga kuparadzaniswa nematosis. Izvo zvinofanira kuonekwa izvi zvikamu zvechinhu ichi: mumarume, kubereka kwemasero epabonde kunowanikwa muupenyu hwose (kubvira panguva yekukura ), uye mumadzimai aya danho iri rinotanga pachikwata chekusimudzirwa kwemubryonic (mwedzi 2-5 yekuvandudza kwechi fetus).
2. Nhanho yekukura. Pane kuwedzera kwakasimba kwepabonde masero muhukuru. Somugumisiro, vanoshanduka kuva spermatocytes uye maoocyte ehurumende yekutanga. Muchiitiko ichi, maoocyte akakura muhukuru nokuti anowedzera zvimwe zvekudya zvakakosha pakuvandudza kwemazamu mushure mekudyarwa kweoocyte.
3. Chikamu chekutsvaga. Inozivikanwa nechitendero che meiosis 1 uye meiosis 2. Somugumisiro weboka rokutanga, spermatocytes uye maoocyte zvinoumba 2 mirairo, uye mushure mechipiri - mazai akakura uye spermatids. Zvinokosha kuti utaure kuti chirwere chepermatocyte chekuita 1 mushure mekugoverana kunopa 4 spermatids, uye kubva kune oocyte ye1 kura imwe chete uye 3 polar corpuscles inoumbwa.

Ndezvipi zvakasiyana mu oogenesis uye spermatogenesis?

Kutakura kuenzanisa kweiogenesis uye spermatogenesis, zvakakosha kutaura kuti kusiyana kukuru kweizvi ndechokusavapo mu ovogenesis yezvikamu zvina zvekuumbwa. Inongova spermatids chete inoshanduka ku spermatozoa. Maumbirwo emasero ezvepabonde anotanga chete nekutanga kwekuyaruka muvakomana.

Mitemo yose yepamusoro ye spermatogenesis uye oogenesis ine zvarinoreva. Nokudaro, somuenzaniso, kupatsanurana kwemashure emagetsi panguva ye oogenesis kunokurudzira kuumbwa kweivha rimwe chete guru rinopa zvokudya.

Uyezve, chokwadi chokuti spermatozoa inoumbwa zvakawanda zvinokonzerwa nekuti kana mazai anogadzirwa, inongova imwe chete yechirume chepabonde inosvika. Vamwe vose vanofa panzira kuenda kumukadzi wechikadzi.

Tinokupa mufananidzo wakajeka wekunzwisisa zviri nani nzira dze spermatogenesis uye oogenesis, umo pfungwa huru dzeumwe neumwe wavo dzinoratidzwa.