Iqanda ne-spermatozoon ngamaseli amabili, lapho umuntu ozayo eqala ukuthuthukisa khona. Unolwazi oluyisipesheli lwezakhi zofuzo olungenalo kuphela ubulili bomuntu, kodwa nokubukeka kwakhe, umlingiswa, isimo sempilo nokunye okuningi. Isikhathi sokuqala kokuphila komuntu omusha ngaso sonke isikhathi sibangela isithakazelo.
Uyini umehluko phakathi kweqanda nesidoda?
Amaqanda akhiwa emzimbeni wesifazane ngisho nasesiteji sokuthuthukiswa kombungu, uzalwa ngamaqanda ayizinkulungwane ezingama-400, okungama 200-400 kuphela azovuthwa futhi ashiye i-ovary empilweni yakhe yonke, kuye ngokuthi inani lemijikelezo yokuya esikhathini. I-ovum yezinsikazi yisona esikhulu kunazo zonke emzimbeni, sinesayizi sembewu ye-poppy, futhi ku-dish yasePetri singabonwa ngeso lengqondo. It is a shape nxazonke, ngaphakathi it is cytoplasm kanye nucleus. Ngaphezu kwalokho, ngokushesha ngemva kokushiya i-ovary, lizungezwe uhlaka olukhulu lwe-epithelium, oluzokwehlulwa kancane kancane njengoba iqanda lidlula e-tube fallopian. Iqanda alikwazi ukuhamba ngokuzimela.
I-Spermatozoon iyinhlangano encane. Kubonakala sengathi i-tadpole, inenhloko enkulu, efana nesimo esingaba nxazonke noma ehambisanayo, nomsila omncane. Ngenxa yomzimba wobulili, owesifazane ufika ezinkulungwaneni eziyizinkulungwane zezigidi ze-spermatozoa esibelethweni sowesifazane, kodwa kuphela esisodwa, esinamandla kunazo zonke futhi esheshayo, sizokwazi ukutshala iqanda, elizobe liseduze neseli elivuthiwe ngaphambili kunabanye. I-sperm ithatha ukwaziswa kofuzo, okuzodluliselwa enzalweni, cishe 40% yayo inezinhlaka ze-DNA ezikhomba izici zengane yakho. I-Spermatozoa ihamba ngokushesha kakhulu, ngehora angakwazi ukunqoba ibanga lamamitha amabili.
Kukuphi ukukhulelwa okwenzekayo?
Iqanda ne-spermatozoon zitholakala, njengombuso, ezigayini ze-fallopian, ezihlanganisa isibeletho kanye nesisu somunye nomunye. I-spermatozoa iwela emathangeni amathangathi avela emzimbeni, futhi igcwalisa zombili izilimo eziyizigaxa, futhi amaqanda ashiya eyodwa kuphela yama-ovari. Kungakapheli amahora ambalwa, iqanda lizokhulelwa futhi liqale uhambo lwayo emuva esibelethweni ngokusebenzisa amashubhu angama-fallopian sinuous. Le ndlela izothatha iseli ezinsukwini ezimbalwa.
Phakathi nalesi sikhathi, amaseli amabili azohlanganyela ngokuhlanganyela, ekwakheni ingane ezayo, izitho zayo eziyinhloko. Izinsuku ezingu-7-10 emva kokukhulelwa, iseli lizohambisana ne-epithelium, ehlanganiswe nesigqila se-uterine, futhi kusukela kulo iqala ukwakha umbungu kanye ne-amniotic fluid egcwalisa kancane isikhala sonke sesisu bese iba i-placenta edla umntwana kuze kube sekuzalweni kwayo.
Iqanda likhulelwa kanjani?
Enye inkinga ebalulekile ukuthi i-sperm ingena kanjani iqanda. Ngaphandle, iseli sigcwele ungqimba we-epithelium, futhi isidoda kufanele siphume nge-epithelium, ngenxa yalokhu, isebenzisa umsila. Ngaphansi kwala maseli kuyinto enamathele, lapho i-sperm ifaka khona futhi iqhubeke iqhubekela phambili. I-spermatozoa eningi ingabamba iqhaza endaweni yokuqala, kodwa kuphela kuphela esheshayo kuzofinyelela i-nucleus bese iqedela inqubo yokukhulelwa.
Mangaki ama-spermatozoons alinde iqanda?
Iqanda lilungele ukukhulelwa isikhathi esincane kakhulu, cishe amahora angu-24. Uma ngalesi sikhathi kungekho spermatozoa eseduze, ukukhulelwa ngeke kwenzeke. Kodwa-ke, i-spermatozoa ngokwabo iyakhathalela kakhulu, emkhakheni wesifazane ongasetshenziswa kuze kube yizinsuku ezingu-7 (ngokwesilinganiso - izinsuku ezingu-3). Lokhu kwandisa amathuba okukhulelwa.
Iqanda ne-sperm yizona amangqamuzana amabili eziyinhloko lapho umntwana wakho azokhula khona kamuva, ahluke komunye nomunye ngezici ezihlukahlukene, ahlangane futhi avuselele impilo entsha.