Ukwahluka kwe-spermatogenesis ukusuka ku-oogenesis

Inkqubo yokuvelisa, ukukhula kunye nokukhula komzimba weegciwane ze-biology ngokuqhelekileyo kuthiwa igama elithi "gametogenesis". Kule meko, inkqubo yezinto eziphilayo apho ukukhula kwenzeka khona, kwaye ukukhula komzimba kweeseli kubasetyhini, kuthiwa yi-oogenesis, kunye nendoda yi-spermatogenesis. Nangona kufana ukufana, baninzi ukuhluka. Masiqwalasele ngakumbi kwaye senze uhlalutyo olulinganiswayo lwenkqubo zombini: i-oogenesis kunye ne-spermatogenesis.

Uwuphi umehluko?

Ukwahluko wokuqala phakathi kwe-spermatogenesis kunye ne-ovogenesis yinyaniso yokuba ngaphezu kwecala lokuzalisa, ukukhula komzimba, ukukhula, kukho kwakhona isakhiwo sesine. Kulo thuba ukuba iiseli zokuzalana zesilisa zenza i-apparatus yokuhamba, ngenxa yoko zifumana ubungqina obude, obangela ukuhamba kwazo.

Ingxenye yesibini eyahlukileyo ingabizwa ngokuba yinto esekelwe kwisigaba sesahlulo esivela kwi-spermatocyte ye-oda, ii-4 zesini zesondo zifumaneka ngokukhawuleza, kwaye enye yelesi yesibini yokuzala iyalungiselelwa ukusuka kwinqanaba lokuqala le-oocyte, elulungele ukuchumisa.

Xa kuthelekiswa nedatha yeenkqubo ezi-2 (i-oogenesis kunye ne-spermatogenesis), kufuneka kuphawulwe ukuba i-meiosis yezesini zesini kubasetyhini ibonwa nakwizinga lokuphuhliswa kwe-intrauterine, i. Iintsana zizalwe ngokukhawuleza kunye ne-oocytes zomyalelo wokuqala. Ukukhula kwazo kuphelisa kuphela ngokuqala kokukhula kwesondo kwintombazana. Nangona kunjalo, kumadoda, ukubunjwa kwe-spermatozoa kwenzeka ngokuqhubekayo, ngexesha lokuphela komntwana.

Enye yeentlukwano kwi-spermatogenesis kunye ne-oogenesis yinto ebonakalayo kumzimba wesilisa, ukuya kwi-30 million spermatozoa imihla ngemihla, kunye nabasetyhini bakhula kuphela amaqanda ama-500 kuwo wonke ubomi bawo.

Kufuneka kwakhona kuqaphele ukuba isigaba sokuzaliswa ngexesha le-spermatogenesis livela ngokuqhubekayo, ngelixa i-oogenesis iphelela emva kokuzalwa.

Ukuqhelanisa lo mpawu we-oogenesis kunye ne-spermatogenesis, ndingathanda ukuphawula ukuba, ngenxa yokwakhiwa kwe-oocytes kuqala ngaphambi kokuzalwa kwentombazana, kwaye izalise iqanda kuphela emva kokuqumba, izinto ezinobungozi zendalo zingakhokelela kwimvelo engafanelekanga kwimbewu .