Umzimba womntu nendlela owenziwe ngayo ngendlela entsonkothileyo iye yabangela umdla kwizazinzulu nabaphengululi kangangeenkulungwane. Nangona sisazi okuninzi malunga nemisebenzi yamalungu kunye neenkqubo ezahlukeneyo, kusekho iimfihlakalo ezixakayo ekusafuneka zisonjululwe. Enye yezo zintsonkotha kukuba amadoda anazo na iingono – umdla osele ubangel’ umdla kwiingcali iminyaka.
Ngokwembali, umbuzo wokuba kutheni amadoda eneengono uye wavelisa iithiyori ezahlukeneyo kunye neengqikelelo. Ukucacisa le nto, abaphandi baye baphanda kwi-embryology nakwimizila yemfuza ukuze bafumanise oonobangela bayo.
Ukukhula kweembryo ezanyisayo ngundoqo ekuqondeni ubukho beingono kwisini zombini. Kwinqanaba lokuqala lophuhliso, ngaphambi kokuba isondo sichongwe, i-biological blueprint sele iqulethe amandla okwakhiwa kwengono. Ubukho be-chromosome ye-Y bubangela ukukhululwa kwe testosterone, ekhokelela ekuphuhlisweni kweempawu zesilisa. Nangona kunjalo, ngeli xesha iingono sele zenzekile, ngoko ke iingono zikhona kumadoda nabasetyhini.
Ngaphezu koko, ukufana kweembumba zenkunzi nemazi kudlulela ngaphaya kweengono. Amanye amalungu amaninzi kunye neempawu, ezifana nezakhiwo ze-pelvis kunye ne-larynx, nazo ekuqaleni ziphuhliswe ngaphandle kokungafani okusebenzayo phakathi kwesini. Oku kuhlangana kwenguquko phakathi kwamadoda namabhinqa kunokunxulunyaniswa nokwakheka kofuzo okufanayo okwabelwana ngabo bonke abantu.
Kukwafanelekile ukuqaphela ukuba iingono zisebenza injongo ebalulekileyo kwabasetyhini – ukuncancisa. Ngokwembono yebhayoloji, abasetyhini kufuneka babe neengono ezisebenzayo ukuze bakhulise inzala. Noko ke, emadodeni, iingono azinanjongo zicacileyo. Azinawo amadlala ebele okanye imibhobho efunekayo ukuze kuveliswe ubisi. Ke ngoko, zihlala ziyintsalela yezakhiwo ezingenamsebenzi womzimba.
Nangona ubukho beengono zamadoda bubonakala budideka, kubalulekile ukuqonda ukuba ziyintsalela yophuhliso lwethu lwe-embryonic. Ngokusisiseko, yimveliso yendalo yethu yemfuza kunye neplani ekwabelwana ngayo yomzimba womntu.
Ngaphandle kweengcaciso zenzululwazi, iingono zamadoda zihlala ziphethe inkxalabo yobuhle kunye nebala lentlalo. Iziganeko zoosaziwayo abangamadoda abanxiba ngendlela engafanelekanga okanye baveze iingono zabo esidlangalaleni zibangele intlebendwane nempikiswano. Nangona kunjalo, izithethe zentlalo ziyavela kwaye iincoko malunga nokwamkelwa komzimba kunye nokubonakaliswa kobuntu kuya kuphawuleka ngakumbi.
Lilonke, imfihlakalo yokuba kutheni amadoda eneengono zimiliselwe kwinkqubo entsonkothileyo yophuhliso lwe-embryonic kunye ne-genetic makeup. Nangona isenokubonakala ingaqhelekanga, ibubungqina beempawu zethu ezifanayo njengabantu. Njengoko siqhubeka nokutyhila iimfihlelo zebhayoloji, kubalulekile ukukhuthaza uluntu olunyamezelayo nolubandakanyayo, apho ubukho beengono zamadoda bujongwa njengento engokwemvelo kunye nengabalulekanga yokwahluka kwabantu.
Ixesha lokuposa: Oct-28-2023