Isakhiwo iseli isidoda

Isidoda ngokuthi ubulili amaseli besilisa (gametes). Ubukhulu bayo (ngaphandle umsila obuphelele) lincane kakhulu ubukhulu zygote. isakhiwo ezincane of isidoda ngenxa isidingo ukudlula ibanga kuqhathaniswa eside ukufinyelela Iqanda yabo. Kumele kuqashelwe ukuthi le cell has usayizi kulencane kuqhathaniswa nawo wonke amangqamuzana omuntu.

Isakhiwo iseli isidoda

Ukwakheka gametes ihlanganisa ikhanda, entanyeni, maphakathi ingxenye (umzimba) kanye nomsila. Le ngxenye phambi ikhanda okusaqanda yakhiwa acrosome okuthiwa. It siqukethe le enzyme lapho egg shell nokonakala kwenzeka. Ukuze acrosome iyona core, equkethe amabili nantathu Ama-chromosomes e besilisa. Ngesikhathi sokukhulelwa, basuke kuhlangene amabili nantathu Ama-chromosomes e zesifazane eziqukethwe iqanda. Ngakho efaka umquba isidoda kuletha kuphela X noma Y-chromosome, kanjalo sokunquma, ubulili umntwana.

Sheika gametes eyenza umsebenzi yokuxhuma phakathi ekhanda nasemzimbeni. Ukuhamba entanyeni ivumela ikhanda ukuze oscillate ngesikhathi ukunyakaza isidoda.

Umzimba esitokisini ngesimo intambo Axial esakhiwa mitochondria futhi microtubules.

Tail siyaqhubeka ingxenye maphakathi (umzimba) futhi kuhlanganisa microtubules camera cytoplasm.

Isakhiwo evamile Isidoda ejwayelekile ukuba ingxenye yabo bonke labo abakhona kule isidoda. Kufanele kuqashelwe ukuthi ukukhubazeka musa kuthinte izinhlayiya eziyisisekelo zofuzo of gametes. Kulokhu, isakhiwo ezilimele isidoda kungathinta ikhono layo ukufinyelela iqanda.

Ekwakhiweni kula maseli yenzeka crimped camera wamasende seminiferous tubule epithelium. Lezi tubules aqhubeke e tubules ngqo. Nazo ngokufanayo, yakha epididymis. Isidoda ngizodabula zonke tubules. Ngakho, kukhona nokuvuthwa kwawo ngokugcwele. I epididymis ludlulele imbobo elandela canal inguinal futhi phakathi komgodi ongaphakathi kwamathumbu. Uma lokhu imbobo uthululela phakathi vesicles kwesidoda elitholakala ngemva kwesinye. I vesicles kwesidoda kwenzeka ekuqongeleleni spermatozoa futhi ukuxuba zabo imfihlo izindonga zawo. Ukwakheka uketshezi zihlanganisa izakhi ezibalulekile ekhuthaza isidoda neqanda. Ngokwe ejaculatory imbobo wesilisa ocansini amaseli kusukela vesicles kwesidoda ayingxenye endlaleni engasesinyeni. Lapho exutshwe izimfihlakalo zayo. Amakhemikhali nezakhi ukukhiqiza isidoda ane-alikhali imvelo. Imiphumela iba yinhlanganisela yokukhandleka ukumiswa ebizwe isidoda. Phezu okuvela ejaculation besilisa ke iwela urethra we deferens vas bese nge force uyakhishwa kusuka emzimbeni.

Umqulu ejwayelekile ejaculate ngaphakathi namamililitha emithathu kuya kwemihlanu, kuyilapho inani labantu okufanele isidoda ngemililitha kwesidoda ngamunye akufanele kube ngaphansi kuka-ezingaphezu kwezigidi ezingamashumi amabili. Esimweni esejwayelekile we umthondo, isidoda wesilisa kufanele kungabi wokuhlanganisa (izifunda ne lokuhlala ezinkulu). Ngezinye izikhathi, kungaba kulawa masayithi kunqunywa zibukeke - bona zihlukaniswa mhlophe omkhulu kanye kwabantu.

Ngesikhathi ejaculation entanyeni sowesifazane kwesibeletho uthola isamba esikhulu isidoda. Nokho, ingxenye kuphela olukwaziyo edlulisa ipulaki lwamafinyila ku lesizalo canal wesibeletho. Yalesi isidoda nengxenye, yena, kuyinto encane kuphela ingxenye uyakwazi ukufinyelela umlomo amashubhu lesizalo. Kulokhu, iqanda kuyinto kwelinye tube kwesibeletho. Ngenxa yalokho, endleleni eya iqanda kuyinto isidoda ngisho kancane, okungezona zonke awela tube fallopian. Ngakho, iqanda bungatholakala amaseli owesilisa mayelana amabili namashumi kuphela.

isidoda bukhoma kanjani eside

Ngamahora ambalwa ezisele sangasese ebhubhisa gametes esidi uketshezi lwesitho sangasese sowesifazane. Isidoda wesibeletho angaphila izinsuku ezintathu kuya kweziyisihlanu (ngezinye izikhathi eside), kuye ngokuthi inani isikhwehlela wesibeletho.