Ukwakhiwa kwesidoda

I-cell cell ibizwa ngokuba yi-gamete yindoda (gamete). Ubungakanani bayo (ngaphandle kokuqwalasela ubude bomsila) buncinane kunobungakanani be-zygote. Isakhiwo esincinane se-spermatozoon siphumelele ngenxa yokufuna ukudlula umgama omkhulu ukufikelela kwiqanda. Kufuneka kuqatshelwe ukuba le nqwelwana inexabiso elincinci kakhulu xa kuthelekiswa nawo onke amaseli.

Ukwakhiwa kwesidoda

Ulwakhiwo lwegetete luquka intloko, intamo, inxalenye ephakathi (umzimba) nomsila. Inxalenye yangaphambili yentloko ye-oval iqulethe okuthiwa i-acrosome. Iqukethe ama-enzyme, apho ukuchithwa kwegobolondo yeqanda. Emva kwe-acrosome yinucleus equle i- chromosomes yamadoda angamashumi amabini anesithathu . Xa zifakelwe, zidibanisa kunye nama-chromosomes amabini amabhinqa aqulethwe kwiqanda. Kule meko, i-sperm fertilizer izisa i-X okanye i-chromosome ye-Y, ngaloo ndlela igqiba ngesondo somntwana.

Umdlavuza wesibeletho wenza umsebenzi osebenzayo phakathi kwentloko nomzimba. Ukuhamba kwentamo kuvumela intloko ukuba ifuthe ngexesha lokunyakaza kwesidoda.

Umzimba weseli wenziwe ngolu hlobo lwe-axial filament, equkethe i-mitochondria kunye ne-microtubules.

Umsila uqhubeka nendawo ephakathi (umzimba) kwaye iquka i-microtubules ehlanganiswe ne-cytoplasm.

Isakhiwo esiqhelekileyo se-spermatozoon sibonisa isiqingatha sabo bonke abakhona kwisidoda. Kufuneka kuqatshelwe ukuba ubukho beziphene abuchaphazeli iimpawu ze-genetic zamagetet. Kule meko, isakhiwo esingenasiphelo sembewu singathintela amandla akhe okufikelela kwi-oocyte.

Ukuveliswa kwala maseli kwenzeka kwii-tubuliti ze-epithelium ezinama-stollium, e-spermatogenic. Ezi zi-tubules ziyaqhubeka zidlulele kwii-tubules ngqo. Bona nabo, benza i-appendage yekontenti. Umdaka kufuneka udlule kuzo zonke iiblule. Ngako oko, ukuvuthwa kwakhe okupheleleyo kwenzeka. I-adnex ye-itekisi idlula kwi-duct, edlula emgodini we- inguinal ize ingene kwisisu esiswini. Kule meko, i-duct iyangena kwi-vesicles ye-seminal esecaleni kwesibindi. Iimpawu ze-Seminal ziqokelela i-spermatozoa kwaye zidibanise kunye nokufihla kweendonga zazo. Ukufihla kubandakanya izondlo eziyimfuneko, ezifaka isandla ekukhuthazeni idiza kwiqanda. Kwimijelo ejaculatory, iisini zesini zesini ezivela kwi-vesin vesicles zingena kwi-prostate gland. Apha baxubana nemfihlo yakhe. Iimveliso zamakhemikhali kunye nezondlo zenza indawo yendalo ye-alkaline ye-spermatozoa. Isiphumo kukumiswa, okubizwa ngokuba ngumduna. Xa kuqalwa ukunyuka kwamadoda, kungena kwi-urethra kwi-vas deferens, ize ikhutshwe ngaphandle komzimba ngamandla.

Okuqhelekileyo ngumthamo we-ejaculate ngaphakathi kwee-milliliters ezintathu ukuya kwezihlanu, ngelixa inani le-sperm ngayinye nge-milliliter yesidoda kufuneka libe ubuncinane ubuninzi bezigidi ezimashumi amabini. Kwiimeko eziqhelekileyo zesitho somzimba, indoda ayifanele ibe ne-spermatozoa (iindawo zokudibanisa okukhulu). Ngamanye amaxesha iinkalo ezinjalo zingabonwa ngokubonakalayo - ziyaziwa ngobungakanani obukhulu kunye nobuninzi.

Ngexesha lokunyuka, umthamo omkhulu wesilisa ungena kwisibeleko sesisu somfazi. Nangona kunjalo, isiqingatha sawo sinako ukugqithisa iplagi ye-mucous kwi-canal neck neck. Kule qingatha yesidoda, kwakhona, inxalenye encinci kuphela inokukwazi ukufikelela emlonyeni wamathambo. Kule meko, iqanda likwiphepha elilodwa lombele. Ngenxa yoko, nokuba ne-spermatozoa encinci ihleli endleleni eya kwi-ovum, engenawo onke amathandle e-uterine. Ngaloo ndlela, i-ovule inokufikelela kuphela malunga namakhulu amabini eesilisa.

Ubomi obude buhlala phi

Ngethuba leeyure ezimbalwa, iigetet eziseleyo kwisiswini zonakalisa imo engummangaliso yecala lomzimba. Emlonyeni wesibeleko, isidoda sinokuhlala kwiintsuku ezintathu ukuya ezintlanu (ngamanye amaxesha ngaphezulu), kuxhomekeke kwisixa somkhuhlane wesibeletho.