Sifuna ukukutshela ukuthi yini isidoda ngendlela elula, ukuze ukwazi nokuyichazela amadodana akho namadodakazi akho. Ngaphandle kwesifundo se-anatomy, asebevele benaso encwadini yabo yokufunda, sifuna ukukhuluma nawe ngesidoda nge ngokwemvelo.
Isidoda yizo amaseli ocansi abesilisa, futhi ingenye yezincane kunazo zonke emzimbeni. Singasho ukuthi yinto encane kakhulu, inebude obungu-40 kuye ku-250 μm, iyunithi yokukala kuma-micrometer. Inenhloko, intamo, into ephambili, nomsila.
Isidoda nokuthomba
Isidoda zenzeka njalo kusukela ebusheni, kukho konke ukuzala kwendoda. Lapho ingane ifinyelela eminyakeni eyi-10 noma eyi-11 ubudala, amangqamuzana angavuthiwe okuzala ahamba ngenqubo ebizwa ngokuthi i-spermatogenesis. Ukukhiqizwa kwesidoda ngesikhathi sokuthomba kuveza ukungcoliswa ebusuku, yizichitho ezenzeka ngenkathi ingane isalala, futhi ngendlela engazi lutho.
Yisikhathi lapho beqala ukwanda ngokushesha futhi baqhubeke behlukanisa futhi bahlukane ukuze ekugcineni bakhule isidoda esivuthiwe. Le nqubo yenzeka ngaphakathi kwamasende, ikakhulukazi emapayipini aziwa ngokuthi tubules seminiferous. La ma-tubules akhiwa izinhlobo ezimbili zamaseli: Amaseli we-Sertoli namaseli we-spermatogenous. Lezi zokugcina yizo eziveza isidoda, kanti ezinye ziyazondla futhi ziyazivikela.
Ngesikhathi sokuthomba isidoda zenziwa ngejubane elisheshayo, kuze kufike ku-1000 isidoda ngomzuzwana. Kepha ukusuka lapho kuya kulokho ukuvuthwa kunenqubo, okungekho ngokushesha. Kuthatha amasonto ambalwa, phakathi kwezinyanga ezimbili kuya kwezintathu, ukuthi isidoda esisha sigudluke ngokuphelele futhi sivuthwe emasendeni.
Ikhwalithi yesidoda
Umsebenzi wesidoda ukuvundisa iqanda, noma kunjalo, iningi liyakhipha bafile noma abakwazi ukuvundisa. I-WHO ilinganisele ukuthi i-90% yevolumu yesilisa ngesikhathi sokukhishwa kwe-ejaculation inezimfihlo ezivela ezithweni zocansi ezifinyelelekayo. Okungukuthi, iningi lesidoda alisona isidoda, kodwa i-plasma yesidoda, eyi-alkaline, ejiyile necebile ngoshukela we-fructose njengesakhamzimba sesidoda, kepha yona uqobo engavundisi.
Ukukhula kweminyaka kuhlotshaniswa ne- ukuncipha yekhwalithi yesidoda. Uma sikhuluma ngekhwalithi sazisa i-your ukuhamba, okungukuthi, amandla okufinyelela iqanda, ukwakheka kanye nevolumu yesidoda. Amaseli anephutha enza izinqubo zokuhlelwa kwamaseli okuhleliwe.
Ikhwalithi yesidoda nemingcele azimile. Lokho kungukuthi, kuyo leyo ndoda, izici zempilo yakhe, ezinjengokuxineka, utshwala, imishanguzo ethile, izothonya ikhwalithi yesidoda sakhe. Ukudla okunempilo, okunothile ngezithelo nemifino, kanye nokuzijwayeza ukuzivocavoca kungasiza ekuthuthukiseni ikhwalithi ye-spematozoa.
Amanye amaqiniso ngesidoda
Kubantu, isidoda yiso onomthwalo wokunquma ubulili bengane. Iqanda lihlala line-chromosome X yocansi, kepha isidoda ngasinye singaba ne-X chromosome noma i-Y chromosome.
Ngemuva kwe-ejaculation, isidoda singakwazi vundisa iqanda kuze kube yizinsuku ezinhlanu. Kepha amathuba okukhulelwa kusuka esidoda esidala aphansi kakhulu. Bangaphila futhi basebenze kuze kube yizinsuku ezinhlanu emgudwini wokuzala, kepha ngeke bahlale bephila noma kumashidi, noma kubhavu, noma ezinye izinto ezikhulunywa izinganekwane zasemadolobheni.
Ngumsila, ongaba ngezinhlobo ezi-4 ezihlukene, okunquma kakhulu umthamo wokuhamba kwawo. Ijubane lapho isidoda sihamba khona ku-ejaculation cishe Amakhilomitha angama-50 ngehora.
Kuze kube manje, ukukhulelwa kwethulwe kithina njengomncintiswano wokuncintisana, kepha ososayensi abavela eMassachusetts Institute of Technology (MIT) bathi isidoda sihlangana ndawonye, njengesikole sezinhlanzi ukwandisa amathuba okufinyelela ngempumelelo eqandeni. Ukubambisana esikhundleni sokuncintisana.