Okuqukethwe
Sikhiqizwa kanjani isidoda?
Ukuhlinzwa okubucayi kuqala kumashubhu e-seminiferous of the testes, lapho izinga lokushisa liphansi kakhulu (34 ° C). I-sine qua non yokusebenza kahle kwayo ngoba uma amasende etholakala ngaphakathi emzimbeni ngokwawo, izinga lokushisa lomzimba (37 ° C) liphezulu kakhulu ukwakheka kwe-spermatogonia, amaseli azophenduka abe isidoda. Ngaphezu kwalokho, laba bakamuva bayafuduka ngesikhathi soshintsho futhi bathole izingxenye ezintsha esigabeni ngasinye. Ngakho-ke, kusukela kumashubhu e-seminiferous of the testes, adlulela ku-epididymis, umgudu omncane ophezu kwamasende lapho ethola khona i-flagella yawo, ewavumela ukuba ahambe. Ekugcineni, isitobhi sokugcina: ama-seminal vesicles lapho ahlangana khona noketshezi oluzoqhutshwa ngesikhathi sokuphuma. Ukuze uqaphele: indoda ingahlala ivundile ngesende elilodwa kuphela, uma isebenza ngokujwayelekile.
Isidoda siqukethe izigidi zesidoda
Ce uketshezi olukhanyayo nolumhlophe ikhiqizwa emithanjeni yesidoda lapho ichunyiswa khona ngemisoco (ama-amino acid, ama-citric acid, i-fructose…) kodwa nase-prostate ekhiqiza cishe ingxenye yesidoda. Lapho, lolu ketshezi luhlangana nesidoda esifika nge-vas deferens (isango eliphakathi kwe-epididymis ne-vesicle) ukuze kwakheke isidoda, okungukuthi, isidoda esivundisayo. Nge-ejaculation ngayinye, indoda ichitha u-2 kuya ku-6 ml wesidoda, equkethe cishe izigidi ezingu-400 ze-spermatozoa.
Ingabe zikhona izikhathi ezivundile kakhulu kunezinye kubantu?
I-Spermatogenesis iqala ekuthombeni futhi iqhubeke impilo yonke, nsuku zonke, amahora angu-24 ngosuku. Njengakwabesifazane, ayikho imijikelezo. Ngaphandle uma kunenkinga yezempilo edala ubunyumba, Ngakho-ke indoda ayishodi ngesidoda. Nokho, ngemva kuka-50, izinto zishintsha kancane : isidoda sincane futhi sisezingeni eliphansi. Kodwa lokhu akuhlangene nokuzala kwabesifazane, okugcina unomphela ekunqamukeni kokuya esikhathini.
I-Spermatogenesis isho ukuthini inqubo yokukhiqiza isidoda. I-Spermatogenesis ihlala kancane ngaphezu kwezinsuku ezingu-70 (cishe izinyanga ezimbili nesigamu). Kwenzeka ngezigaba eziningana. Ekuqaleni, iqala ngama-germline stem cell, abizwa ngokuthi i-spermatogonia. Lezi ziphindaphindeka futhi ziphenduke zibe ama-spermatocyte, bese kuba ama-spermatid futhi ekugcineni abe yi-spermatozoa. I-spermatogonia iyodwa inikeza isidoda esiphakathi kuka-30 no-50. Kuphakathi nalesi sigaba sokugcina lapho kwenzeka khona ukuhlukana kwamangqamuzana ( meiosis ), lapho ingqamuzana lilahlekelwa ingxenye yama-chromosome alo. Ngakho-ke isidoda sinikezwa ama-chromosome angu-23. Lapho behlangana ne-oocyte, nayo enama-chromosome angu-23, bakha iqanda elinama-chromosome angu-46.
Singakwazi yini ukukhulisa ukuzala kwabesilisa?
Kwabesilisa, asikho isidingo sokukhomba izinsuku ezinhle njengakwabesifazane. Ngokwesinye isandla, ugwayi (njengotshwala) unciphisa kakhulu inzalo emadodeni, ikakhulukazi ngokushintsha izinga lesidoda. Ukuyeka ukubhema kukuvumela ukuthi uphinde uthole inzalo efanelekile ngokushesha nje lapho uyeka ukubhema njengoba isidoda sihlala sizivuselela. Ukudla okunamafutha agcwele kwehlisa inzalo! Ngakho-ke gwema izitsha zezimboni, amakhekhe, izitsha ezicebile (ushizi, ukusikeka okubandayo, inyama kumasoso) kanye khetha amafutha amahle (njenge-omega 3). Ukuzivocavoca umzimba njalo kunomthelela impilo enhle yesidoda futhi ikuvumela ukuthi ugcwalise uvithamini D. Ngokuvamile, kuhle ukuqaphela a indlela yokuphila enempilo ngesikhathi sokulala esivamile, isikhathi esilinganiselwe phambi kwezikrini nokugwema ukuchayeka kubaphazamisi be-endocrine.
Isidoda esiphuzi, esisobala: usho ukuthini umbala?
Imvamisa isidoda sinombala omhlophe, kodwa singaphinde sibe sobala noma sibephuzi ngokuphaphathekile. Lapho isidoda siphuzi, lokhu kungase kube uphawu lokutheleleka okungase kuphazamise inzalo. Ingase futhi ibonise i-oxidation ye-spermine, iphrotheni eyenziwa ikakhulukazi uma ubulili bungavamile. Uma kwenzeka umbala wesidoda ophinyisiwe, kunconywa ukwenza a ukuhlolwa kwe-bacteriological yesidoda enqunywe uchwepheshe wezempilo.
Ingabe isidoda sintekenteke?
Isidoda siyazwela ku-acidity ebenza bangabi nalutho. Kodwa-ke, isitho sangasese sowesifazane siyindawo ene-asidi engaphezulu noma encane (iba ne-asidi kakhulu ngemva kokuphuma kweqanda). Kodwa phakathi nomjikelezo wokukhiqiza, isidoda sithola isihlangu: uketshezi lwesidoda (okwakha isidoda) esihlotshiswe ngobuhle be-anti-acidity. Lolu ketshezi luvikela isidoda. Ukushisa futhi kwenza isidoda sibe sengozini kakhulu ngokugqoka izingubo ezimpintshayo, ukugeza kaningi, ukungasebenzi emotweni noma endaweni yokusebenza eshisa ngokweqile.
Isidoda sivundisa kanjani i-oocyte?
Unamathuluzi amaningana esikweletini sakhe. Eqinisweni yakhiwe izingxenye eziningana lapho zonke zingenela kokukhulelwa. Okokuqala, ikhanda ngokwalo elihlanganisa izingxenye ezimbili ezihlukene: i-acrosome, egcwele i-enzyme ekwazi ukubhoboza igobolondo le-oocyte, kanye ne-nucleus, ethwele umthwalo we-chromosomal weseli (ezohlangana ne-oocyte ukuze ibe iqanda) . Isiqephu esimaphakathi esiphansi kwekhanda siyindawo yokugcina imisoco evumela ukuthi isidoda siphile ngesikhathi sisalinde ukuvundiswa. Ekugcineni, i-flagellum iyamvumela ukuthi ahambe ukuze afike ngokushesha ngangokunokwenzeka iqanda.