Ingono
Ezilwaneni ezincelisayo, ingono (ebizwa nangokuthi i-mammary papilla noma umsele ) ukubonakala okuncane kwesikhumba okuqukethe izitolo zamapayipi ama-lactiferous ayi-15 kuya kwezi-20 ahlelwe ngokuzungeza ithiphu. Marsupial futhi ezincelisayo eutherian ngokuvamile anenombolo ngisho izingono ahlelwe bilaterally, kusukela abambalwa njengoba 2 abaningi ngangokunokwenzeka 19.
Isikhumba ingono amumethe wangaphela ekhethekile izinzwa ukuthi ebucayi ezintweni ezithile yilezi: lawa kancane-ukujwayeza kanye nokuthumela ngokushesha-ukujwayeza cutaneous mechanoreceptors.Ama-Mechanoreceptors akhonjwa ngokulandelana ngohlobo Ngiguqula kancane kancane ngezitho zokuphela eziningi zeMerkel corpuscle no Type II ukuzivumelanisa kancane nezitho zokuphela ze-Ruffini corpuscle, kanye nohlobo Ngiguqula ngokushesha izitho eziningi zokuphela ze-Meissner corpuscle no Type II ukuzivumelanisa ngokushesha nezitho zokugcina zomzimba wePacinian .Ukunikezwa kwezinzwa okuvelele engonweni kuvela emagatsheni aqhekekile asemaceleni enzwa yesine ye-intercostal. [1]Ingono isetshenziswa futhi njengophawu lomumo womzimba.Imaka i-T4 (i-vertebra yesine ye-thoracic) yesikhumba futhi ihlala phezu kwezinga elilinganiselwe le-diaphragm.
Ukunikezwa kwemithambo yengono nasesibeleni kuvela emagatsheni angaphakathi angaphakathi emithanjeni yangaphakathi ye-thoracic (mammary); umthambo wesifuba oseceleni; nemithambo ye-thoracodorsal.Imithambo yegazi ifana nemithambo yegazi. Amapayipi e-lymphatic aconsa ingono ayafana nesifubaAma-axillary node angama-axicalary node, iqembu le-lateral neqembu langaphambili.5% we-lymph ukhanywa ngezindawo ezingama-axillary lymph node eziseduze nomakhwapheni. Wonke amanye amanzi ashiya ingono nesifuba ngokusebenzisa ama-infroclavicular, pectoral, noma ama-parasternal node.
Njengoba izingono zishintsha phakathi nesikhathi sokuphila kwabesilisa nabesifazane, ukwakheka kwengono kungashintsha futhi lolu shintsho lungalindelwa futhi lubhekwe njengokujwayelekile.
Cishe zonke izilwane ezincelisayo zinezingono.Kungani abesilisa benengono bekuyindaba yocwaningo lwesayensi.Umehluko phakathi kobulili (obubizwa ngokuthi i- dimorphism yezocansi ) ngaphakathi kohlobo olunikeziwe kubhekwa ososayensi bezinto eziphilayo ngokuziphendukela kwemvelo ikakhulu njengomphumela wokukhethwa kocansi, ngqo noma ngokungaqondile.Kukhona ukuvumelana ukuthi ingono yesilisa ikhona ngoba ayikho inzuzo ethile kwabesilisa abalahlekelwa yisici (lokhu kubizwa ngokuthi yi- spandrel ). [2]
Umsebenzi
[hlela | Hlela umthombo]
Ezocansi
[hlela | Hlela umthombo]Izingono zingazwela ukuthintwa, futhi ukuvuselelwa kwezingono kungavusa ukuvusa ucansi.Bambalwa abesifazane ababika ukuthi bathola i- orgasm kusuka ekuvuseleleni ingono.Ngaphambi kocwaningo lukaKomisaruk et al.lokusebenza kwe- magnetic resonance (fMRI) mayelana nokugqugquzela ingono ngo-2011, imibiko yabesifazane abathola i-orgasm kusuka ekuvuseleleni ingono incike kuphela ebufakazini be-anecdotal .Ucwaningo lukaKomisaruk lube ngolokuqala ukudweba izitho zangasese zabesifazane engxenyeni yezinzwa yobuchopho; kukhombisa ukuthi ukuzwa okuvela ezingonweni kuya engxenyeni efanayo yobuchopho njengokuzwa okuvela esithweni sangasese, i-clitoris kanye nomlomo wesibeletho, nokuthi la ma-orgasms abikiwe angama-orgasms angokobulili abangelwa ukugqugquzela ingono, futhi angaxhunyaniswa ngqo ne-cortex yezinzwa (" indawo yangasese yobuchopho "). [3] [4]
Kwezamabhizinisi
[hlela | Hlela umthombo]Ezinye izinkampani nezinhlangano ezingenzi nzuzo zisebenzise igama lengono noma izithombe zezingono ukunaka umkhiqizo wazo noma imbangela yazo.
- ↑ Grabb & Smith's Plastic Surgery 6th edition. Chapter 59 page 593
- ↑ Lawrence, Eleanor (5 August 1999) (in en). Why do men have nipples?. http://www.nature.com/news/1999/990805/full/news990805-1.html.
- ↑ Empty citation (help)
- ↑ Women's Clitoris, Vagina, and Cervix Mapped on the Sensory Cortex: fMRI Evidence.