Umthondo wendoda

• Umthondo + i-scrotum = isitho sobulili sowesilisa esiyinhloko
• Imisebenzi: Ukukhishwa komchamo kanye nesitho sokukopisha
• Inhloso yokuziphendukela kwemvelo: ukuhlukana ngokocansi kwezinto eziphilayo kanye nokuvundiswa ngaphakathi komzimba wesifazane
• I-Anatomy: impande yomthondo, i-shaft yomthondo, i-glans
• I- glans nejwabu yizindawo ezibucayi kakhulu
• Izidumbu ezintathu ze-cavernous
• Ukugeleza kwegazi kuholela ekuqineni komthondo

Ipipi lika Homo sapiens (indoda yesimanje)

Isihloko esithi "Ipipi Lendoda" singase sibukeke njenge-pleonasm uma usibuka, phela ukuba nepipi kuyingxenye yencazelo yendoda. Kodwa lesi sitho sokukhwelana singatholakala ngezindlela ezihlukahlukene kuzo zonke izilwane ezincelisayo. Ku-anatomy noma ekusebenzeni umthondo wesilisa awukwazi ukufakwa esigabeni esikhethekile sendalo. Umthondo wesilisa - kanye ne-scrotum - isitho sobulili sowesilisa sokuqala. Umsebenzi wayo webhayoloji ukabili. Ipipi lisetshenziselwa ukukhipha umchamo nge-urethra. Ngaphezu kwalokho - noma mhlawumbe ikakhulukazi - iyisitho somuntu sokuhlanganisa.

Umthondo wesilisa ekuthuthukisweni kwemvelo

Umthondo ngokwawo uyimpendulo yemvelo ezinyathelweni ezimbili zokuziphendukela kwemvelo. Isinyathelo sokuqala siwukuhlukaniswa ngokobulili kwezinto eziphilayo - ukuzala ngeke kusenzeka ngokuhlukana noma ngokuzivundisa ngokwazo njengaseziphilayo zakudala. Isinyathelo sesibili ukuvundiswa ngaphakathi komzimba wesifazane - kunokuvundisa amaqanda axoshwa owesifazane emanzini, njengakwezinye izinhlanzi. Ngakho-ke, ukukubeka kalula, isidoda sowesilisa kufanele ngandlela thize sifike emaqandeni emzimbeni wesifazane ukuze siwavundise. Umthondo uthi "ngandlela thize". Ipipi lingabonakala njengendaba yempumelelo yokuziphendukela kwemvelo, phela yathuthukiswa ngezinhlobonhlobo ezahlukene, ngayinye eyavela ngokuzimela komunye nomunye.

I-anatomy encane yepipi lendoda

Ngokwe-anatomically, umthondo womuntu ungahlukaniswa ube impande yomthondo (radix penis), umphini wepipi (corpus penis) kanye ne- glans (glans penis) . Isisekelo somthondo sixhuma okhalweni ngemisipha nemigqa. Njengoba igama lesiLatini libonisa, i-shaft ye-penis ibhekwa njengesitho sangempela sowesilisa. Phezulu ihlangana ne-glans penis, ezungezwe ijwabu (preputium penis). Yilapho ithubhu lesidoda somchamo liphuma khona. I-glans iyindawo ebucayi kakhulu kuwo wonke umzimba wesilisa. I-frenulum ixhuma i-glans nejwabu ngaphansi. I-frenulum nayo ingenye yezingxenye ezizwela kakhulu - futhi ngenxa yalokho ezamukela ngendlela evusa inkanuko - zendoda. I-penile suture ebizwa ngokuthi i-penile suture igijima ngaphansi kwepipi phakathi kwe-glans ne-scrotum. Ipipi linezidumbu ezintathu ezinemigede.

Igama elithi erectile tissue selivele likubeka kucace ukuthi yizicubu ezivuvukala uma kudingeka bese zishintsha ubukhulu bomthondo. Lena imizimba emibili eyisipontshi yomthondo (i-corpora cavernosa umthondo, ubunye: corpus cavernosum) ohlangothini olungaphezulu kanye nomzimba we-urethral spongiy (i-corpus spongiosum penis) ngaphansi, egcina emzimbeni we-spongy wepipi (corpus spongiosum glandis ). Ishubhu le-urethra noma i-urinary seminal tube ligijima ku-urethral erectile tissue.

I-Physiology ye-penile erection

Ukuqhanyelwa kowesilisa kuwumphumela wokugeleza kwegazi okwandisiwe esicutshini se-erectile. Imizimba emibili ye-cavernous ye-penis ehlanganisiwe inesibopho sokuqina kwesitho . Umzimba we-urethral cavernous ohlangothini olungaphansi ugcwala igazi njengesipontshi - yingakho igama lesiLatini - futhi liyavuvukala, kodwa ngaphandle kokufinyelela ubulukhuni obuqhathanisekayo njengeminye imizimba ye-cavernous. Umthondo unikezwa igazi ngemithambo emithathu. Esimeni esingaqondile (esivamile), igazi elincane kuphela elingangena esicutshini se-erectile, ngoba imisipha ehlala iqinile ibopha imithambo yegazi. Ngenxa yalokho, i-cross-section yabo igcinwa incane futhi inani legazi lincane ngokulinganayo. Ngokuphambene nokucwasa okuvamile, ukuqhanyelwa kowesilisa akuwona umphumela wokwanda kwengcindezi. Ngokuphambene nalokho, ukuphumula okuphelele kuphela kwale misipha kuvumela umthondo ukuba uqine. Imisipha iyaphumuza, imithambo impompa igazi elengeziwe emizimbeni enemihume futhi iwavumele ukuba akhule. Imizimba ye-cavernous iyakhula futhi ngaleyo ndlela icindezele imithambo enesibopho sokubuyela emuva kwegazi esiqwini. Ukwanda kokungena nokugeleza kwegazi okucindezelwe kuholela ekumisweni okuphelele. Lo mshini ulawulwa ukusebenzisana okuyinkimbinkimbi kwe-biochemical. Lapha, i-nitrogen monoxide idlala indima ebalulekile, eyaziwa kuphela iminyaka engaba ngu-20. Ezimweni eziningi, ipipi elimile lishintshwa kancane liye kwesokunxele noma kwesokudla, okungukuthi alikho ncamashi phakathi nomzimba. Ngaphandle kwezimo ezimbi kakhulu, ezingase zelashwe ngokuhlinzwa futhi okufanele zelashwe, lokhu kwehluka kuyinkomba yokuthi akekho umuntu onezingxenye ezimbili zomzimba ezifanayo ngokuphelele.

ukuqhanyelwa komthondo

Ukukhipha isidoda kuhambisana nokunwetshwa kwe-urethra. Ngaphambi kokuthi ipipi likhiphe isidoda, "ukulungiswa kwengxube" kwenzeka esigabeni sokuphuma. I-ejaculation iyi-reflex futhi ayikwazi ukulawulwa ngokuqaphela, nakuba ingase ibambezeleke ngokusebenzisa amasu okuqina kwemisipha.