Yiziphi Izimfanelo Eziyinhloko Zesilisa Nendima Yazo Ekuzalaneni?
Ubulili besilisa buyisigaba sobulili bomzimba esihlukile kowesifazane ngokwezici eziningi. Banokwakheka kwezitho zokuzala okuhlukile, amahomoni, nezinye izici zomzimba uma kuqhathaniswa nabesifazane [1]. Uma uzibuza ukuthi kuyini "male", kubhekisela esigabeni sobulili somzimba esichazwa ngemisebenzi ethile yokuzala nezici zomzimba, njengokukhiqizwa kwe-sperm nokuthuthuka okuholwa yi-testosterone.
Abanye abantu baphinde babuze bathi, kuyini "males", okungasho ngokujwayelekile abantu bobulili besilisa abachazwa yindima yabo ekuzaleni nezici zabo zomzimba ezihlukile. Abesilisa bakhiqiza amaseli amancane okuzala abizwa ngokuthi amaseli e-sperm. La ma-sperm aqukethe ulwazi lwezakhi zofuzo mayelana nozakwabo wesilisa, futhi aludlulisele lolu lwazi lwezakhi zofuzo eqandeni ngesikhathi sokufakelwa [2].
Kulesi sihloko, sizohlola indima yobulili besilisa ekuzaleni. Sizophinde sixoxe ngezinhlobonhlobo zezici ezenza owesilisa ahluke kowesifazane.
Izici Ezikhethekile Zamadoda
Amadoda ahlukile kwabesifazane ezicini zabo zomzimba nakwakhiweni kwezitho zokuzala. Nansi indlela:
Izici Zomzimba
Lezi zici zomzimba ezihlukile emadodeni zenzeka ngenxa ye-hormone i-testosterone ngesikhathi sokufikisa [3]. Izici ezingavamile zihlanganisa izwi elijulile, izinwele emzimbeni nasebusweni, ubuningi bamathambo, nemisipha ebanzi emahlombe.
Amadoda futhi anenqwaba yemisipha emikhulu, okuyinto ethonywa ngqo yi-testosterone. Kungenzeka ukuthi uphinde uqaphele ukuthi amadoda ngokuvamile made kakhulu kunabesifazane, okuyinto futhi eyisici esihlukile.
I-testosterone namanye amahomoni alawula zonke lezi zici zomzimba zendoda. Yingakho noma yiliphi ukungalingani kwamahomoni lingathinta ukuthuthuka kwezici zomzimba ezihlukile zendabuko zamadoda.
Izitho Zokuzala
Izici zomzimba akuzona kuphela ezihlukanisa ubulili obubili. Umehluko oyinhloko phakathi kwabo ukwakheka kwezitho zokuzala.
Izitho zokuzala kwesilisa eziyinhloko ngamasende, akhiqiza isidoda ne-testosterone [4]. Amasende apholile kancane kunokushisa komzimba ukuze asebenze kahle. Ezinye izitho zokuzala zesilisa zihlanganisa ipipi, indlala ye-prostate, ama-seminal vesicles, kanye ne-vas deferens.
Ipipi yitho langaphandle lokuzala lowesilisa elivuvukala (likhule) uma kunokungcangcazela kobulili [5]. Ingumthwalo wokukhulula isidoda ngaphakathi emzimbeni wesifazane ngesikhathi socansi. I-vas deferens, okuyithumbu elithwala isidoda, lithutha isidoda lisuka emasendeni liye ephipini ukuze kube nokucishelwa.
AmaHomonini Amadoda Nendima Yawo
I-Testosterone, i-luteinizing hormone (LH), kanye ne-follicle-stimulating hormone (FSH) kubamba iqhaza ekuthuthukiseni izici zobusha emfana nasekusebenzeni kohlelo lokuzala.
- Testosterone: I-Testosterone iwuhomoni oyinhloko wobulili besilisa, futhi ibamba iqhaza elibalulekile ekuthuthukiseni izici zobudoda [3]. Ilawula isifiso sobulili (libido), ukukhiqizwa kwesidoda, inqwaba yemisipha, ngisho nesimo sengqondo.
- LH ne-FSH: Nakana ukuthi i-LH ne-FSH ekhishelwa yindlala ye-pituitary zaziwa kakhulu ngendima yazo emjikelezweni wokuya esikhathini kowesifazane, lezi mahomoni nazo zinemisebenzi emikhulu ekuzaleni kwabesilisa. I-LH ne-FSH emadodeni zinenkRole ekukhiqizweni kwesidoda nasekusebenzeni kwamasende [6].
Amadoda Indima Ekuzaleni
Nansi indima yobulili besilisa enqubweni yokuchumisa nokukhulelwa:
Ukukhiqizwa Kwesidoda
Amasende yizitho ezikhethekile kumadoda ezikhiqiza amaseli esidoda, aziwa kakhulu ngokuthi ama-gamete kanye ne-spermatozoa. Indima yesidoda iwuku-chumisa iqanda lowesifazane ngesikhathi sokuzala. Indoda iqala ukukhiqiza isidoda ngesikhathi sobusha (puberty), futhi ukukhiqizwa kwesidoda kuyaqhubeka phakathi nokuphila, nakuba kungancipha ngokuhamba kweminyaka.
Inqubo Yokuchumisa
Ngesikhathi socansi, isidoda — uketshezi oluqukethe amaseli esidoda — luyacishelwa liphume ephipini lomuntu wesilisa lungene ohlelweni lokuzala lwesifazane. Uma isidoda somuntu wesilisa sifikela ngempumelelo siye eqandeni lowesifazane futhi silichumise, kuba khona ukukhulelwa.
Le nqubo yenzekaseenzeka kuma-fallopian tubes womEmzimbeni wesifazane. Iqanda elichumile bese lehla liye esibelethweni, lapho lizimisa khona esibelethweni izinyanga eziyisi-9 ezilandelayo.
Yini ukuthembeka kokuzala kwendoda okuncike kuyo?
Ukuzala kwendoda kuncike ezintweni ezibalulekile eziningana, okuhlanganisa inani lesidoda, ukunyakaza kwesidoda — ikhono lokunyakaza, nokuma kwesidoda. Ukukhiqizwa kwesidoda esinempilo emadodeni kudinga amazinga amahomoni alinganiselayo, ikakhulukazi i-testosterone. Ukusebenza kahle kwezitho zokuzala nakho kubalulekile ekukhiqizeni isidoda esinempilo.
Izinto eziningi ezihlobene nendlela yokuphila, okuhlanganisa ukudla, ukuzivocavoca, amazinga okucindezeleka, nokugwema imikhuba enobungozi efana nokubhema noma ukuphuza utshwala ngokweqile, nazo ziyizici ezibalulekile.
Okubalulekile
Ubudoda buyindoda noma umfana ongabonakala ngezimpawu zomzimba, njengoboya emzimbeni, izwi elijulile, nemisipha eminingi. I-testosterone ngokuyinhloko imisa lezi zimpawu ezihlukile. Umbuzo othi kuyini ubudoda nawo uhlobene nezindima zemvelo nezokusebenza amadoda awadlala ekuzaleni, ekuthuthukisweni, nasekudlulisweni kwefa.
Indoda inikela ekuzaleni ngokukhiqiza amaseli esidoda nokuwafaka ngaphakathi emzimbeni wesifazane ukuze kube nokufakelwa iqanda. Izinhlobo ezahlukene zemikhuba yokuphila zingathinta ikhono lendoda lokuzala.
Imithombo esetshenzisiwe
- Rich-Edwards, J. W., Kaiser, U. B., Chen, G. L., Manson, J. E., & Goldstein, J. M. (2018). Ucwaningo Ngezinhlobonhlobo Zezocansi Nobulili Ekuklanyweni Kwezifundo Ezisisekelo, Ezezokwelapha, Nezabantu: Okuyisisekelo Kocwaningo. Endocrine Reviews, 39(4), 424-439. https://doi.org/10.1210/er.2017-00246
- Isidoda: Isithombe se-MedlinePlus Medical Encyclopedia. (n.d.). https://medlineplus.gov/ency/imagepages/19471.htm
- Nassar, G. N., & Leslie, S. W. (2023b, January 2). I-Physiology, i-Testosterone. StatPearls - NCBI Bookshelf. https://www.ncbi.nlm.nih.gov/books/NBK526128/
- O’Donnell, L., Stanton, P., & De Kretser, D. M. (2017b, January 11). I-Endocrinology Yohlelo Lokuzala Lwesilisa Nokwakheka Kwesidoda. Endotext - NCBI Bookshelf. https://www.ncbi.nlm.nih.gov/books/NBK279031/
- Panchatsharam, P. K., Durland, J., & Zito, P. M. (2023b, May 1). I-Physiology, Ukuvuka (Erection). StatPearls - NCBI Bookshelf. https://www.ncbi.nlm.nih.gov/books/NBK513278/
- Oduwole, O. O., Huhtaniemi, I. T., & Misrahi, M. (2021). Izindima ze-Luteinizing Hormone, i-Follicle-Stimulating Hormone ne-Testosterone ekwakhekeni kwesidoda nasekwakhekeni kwamaqanda zibuyekezwa. International Journal of Molecular Sciences, 22(23). https://doi.org/10.3390/ijms222312735
