Umbala eziyivelakancane kwamehlo - kuyini?

Njengoba wazi, amehlo kukhona esibukweni komphefumulo womuntu. Kuyinto kubo siyinaka ekhethekile inqubo kuchumana emkhatsini webantfu. Futhi abanikazi off-umbala amehlo nakanjani bahlanganyele ebukeka abaningi bamangala, ekuthandeni. Ngakho kuyini - umbala iso eziyivelakancane?

Ukuphendula umbuzo ezithakazelisayo ngalokho umbala yiso eziyivelakancane, kuzomele uqale akhulume lokho inquma umthunzi iris. Zonke ngalolu daba lesi sakhi, okuthiwa i-melanin - lemali bese lwakha wamehlo kunqunywa yokuba izici zofuzo eziyingozi. Melanin ngaphezulu umzimba, lo mnyama ehlweni lomuntu.

izidalwa eziphilayo 'zinezikhathi ukungabi sombala, okuthiwa ama-albino nelihlo obomvu kanye nombala. Ucwaningo lubonisa ukuthi leli chibi linombala mnyama iris yiyona evelele, echaza predominance yakhe okwakubonakala sengathi ifile yokukhanya. Ngakho-ke, umhlaba abantu okuningi amnyama okotshani. Ukubuthelela melanin kungase kuhambisane kancane ushintsho umbala wamehlo kukho konke ukuphila komuntu. Vala ubudala babo luhlaza ingavuthi olumhlophe ngaphezulu, okuyinto lihlotshaniswa ekulahlekelweni obala okuthiwa mesodermal ungqimba.

Ngakho, njengoba izibalo zibonisa, eziyivelakancane wamehlo emhlabeni - oluhlaza. Sinenkosi% 2 kuphela omphakathi, ikakhulukazi izakhamuzi zasenyakatho-Europe. Futhi eziyivelakancane wamehlo sizalwa nawo abaseTurkey futhi abase-Iceland. Umzimba zabantu zofuzo beyizidlova ukuthuthukiswa imali ezincane melanin.

Brown ngokuvamile ayibonwa. Uma sikhuluma labantu wezwe lakithi, cishe ingxenye yayo has grey amehlo. Brown uneso ingxenye yesine abakhileyo Russia, blue kanye shades of blue iris nobuntu 15-20% wesibalo sabantu. Umbala eziyivelakancane phambi kwamehlo abo abaseRussia futhi oluhlaza.

Enye wamehlo ezingavamile, kwakheka ngenxa ukuguquka kwezakhi zofuzo, kuba onsomi. Ingane izalwe ukuphambuka ezinjalo, ngezinye lokuzalwa ngokuphelele ejwayelekile umthunzi iris: okuluhlaza okwesibhakabhaka, grey noma ensundu. Kodwa ezinyangeni eziyisithupha, kancane kancane washintsha, ekuzuzeni umbala onsomi. Isiqongo sale nqubo ibe okungenani esikhathini sokuthomba, lapho amehlo abe onsomi noma violet-blue amnyama umthunzi. Human umbono zokugula okunjalo ngokuphelele azinalo ithonya, engesiyo esimiso senhliziyo nemithambo yegazi (abanikazi eziningi violet umthunzi amehlo behlushwa yizifo elibuhlungu sphere). Omele bhá wabo edume Elizabeth Taylor.

Ekuphetheni, kufanele kuphawulwe ukuthi main iso imibala abambalwa. Babengase babhekwe ensundu, blue, grey and green. Kodwa imibala zabo ziningi, futhi ngamunye uhlukile. Uma sikhuluma engavamile umbala wamehlo - onsomi futhi abomvu - abayikho kunalokho phetho kwezinso futhi ezibhekwa ibonakalisa izinguquko atypical emzimbeni. Ngesikhathi esifanayo lo eziyivelakancane iso umbala - oluhlaza, esukela esincane melanin, ayikwazi kubhekwe yimuphi ukuphambuka kusuka kuyinsakavukela.