Umzimba womuntu nokuklanywa kwawo okuyinkimbinkimbi kuye kwabahlaba umxhwele ososayensi nabacwaningi emakhulwini eminyaka. Yize sazi okuningi ngemisebenzi yezitho nezinhlelo ezahlukahlukene, kusenezimfihlakalo ezididayo ezingakaxazululwa. Enye yalezo zimfihlakalo ukuthi amadoda anazo yini izingono - ilukuluku osekuphele iminyaka lithakasela ongoti.
Ngokomlando, umbuzo othi kungani amadoda enezingono udale imibono nemibono eyahlukene. Ukuze bakhanyisele lesi senzakalo, abacwaningi bahlola i-embryology nezakhi zofuzo ukuze bathole izimbangela zako.
Ukukhula kwemibungu encelisayo kuyisihluthulelo sokuqonda ubukhona bezingono kubo bobabili ubulili. Ezigabeni zokuqala zokukhula, ngaphambi kokuba kunqunywe ubulili, ipulani yebhayoloji kakade iqukethe amandla okwakheka kwengono. Ukuba khona kwe-Y chromosome kubangela ukukhululwa kwe-testosterone, okuholela ekuthuthukisweni kwezici zesilisa. Nokho, ngalesi sikhathi izingono sezivele zakha, ngakho izingono zikhona kokubili kwabesilisa nabesifazane.
Ngaphezu kwalokho, ukufana phakathi kwemibungu yesilisa neyesifazane kudlula izingono. Ezinye izitho nezici eziningi, njengezakhiwo ze-pelvis kanye ne-larynx, nazo ekuqaleni zikhula ngaphandle kokuhlukaniswa kokusebenza phakathi kobulili. Lokhu kweqana kwemvelo phakathi kwabesilisa nabesifazane kungabalelwa ekwakhekeni kofuzo okufanayo okwabiwa yibo bonke abantu.
Kubalulekile futhi ukuqaphela ukuthi izingono zifeza injongo ebalulekile kwabesifazane – ukuncelisa ibele. Ngokombono webhayoloji, abesifazane kumele babe nezingono ezisebenzayo ukuze bakhulise inzalo. Nokho, emadodeni, izingono aziyona injongo esobala. Azinazo izindlala zebele noma imigudu edingekayo ukuze kukhiqizwe ubisi. Ngakho-ke, zihlala ziyizinsalela ezingenakho ukubaluleka komzimba.
Nakuba ukuba khona kwezingono zesilisa kungase kubonakale kudida, kubalulekile ukuqaphela ukuthi zimane ziyinsalela yokukhula kwethu kombungu. Empeleni, kuwumkhiqizo wokwakheka kwethu kofuzo kanye nepulani ehlanganyelwe yomzimba womuntu.
Naphezu kwezincazelo zesayensi, izingono zesilisa zivame ukuthwala ukukhathazeka kobuhle kanye nokucwaswa emphakathini. Izimo zokugqoka kosaziwayo besilisa ngokungafanele noma okuveza izingono zabo esidlangalaleni ziqubule inhlebo nengxabano. Kodwa-ke, imikhuba yenhlalo iyathuthuka futhi izingxoxo mayelana nokwamukela umzimba kanye nokukhuluma komuntu siqu ziya zigqama kakhulu.
Sekukonke, imfihlakalo yokuthi kungani amadoda enezingono igxile enqubweni eyinkimbinkimbi yokukhula kwe-embryonic kanye nokwakheka kwezakhi zofuzo. Nakuba kungase kubonakale kuyinqaba, kuwubufakazi bemikhuba yethu evamile njengabantu. Njengoba siqhubeka nokwembula izimfihlo zesayensi yezinto eziphilayo, kubalulekile ukugqugquzela umphakathi obekezelelayo futhi obandakanya wonke umuntu, lapho ukuba khona kwezingono zamadoda kubhekwa njengento engokwemvelo nengabalulekile yokuhlukahluka komuntu.
Isikhathi sokuthumela: Oct-28-2023