Metabolisme ya epidermis ni uko keratinocytes yibanze igenda ikomeza hejuru hamwe no gutandukanya selile, amaherezo igapfa gukora corneum idafite nucleate, hanyuma ikagwa.Muri rusange abantu bemeza ko hamwe no kwiyongera kwimyaka, urwego rwibanze na spinous layer rudahungabana, ihuriro rya epidermis na dermis rihinduka igicucu, kandi umubyimba wa epidermis ukagabanuka.Nka bariyeri yimbere yumubiri wumuntu, epidermis ihura neza nibidukikije kandi yibasirwa cyane nibintu bitandukanye byo hanze.Epidermal gusaza byerekana byoroshye ingaruka zimyaka nibintu byo hanze kubusaza bwabantu.
Muri epidermis yuruhu rusaza, itandukaniro ryubunini, morphologie hamwe nibiranga ingirabuzimafatizo ya basal layer selile byiyongera, ihuriro rya epidermis na dermis rihinduka buhoro buhoro, umusumari wa epidermal uhinduka muto, kandi umubyimba wa epidermis uragabanuka.Icyorezo cya Epidermal kigabanuka hafi 6.4% kumyaka icumi, kandi kigabanuka cyane mubagore.Epidermal umubyimba ugabanuka uko imyaka igenda.Ihinduka rigaragara cyane ahantu hagaragara, harimo kwaguka hejuru yisura, ijosi, amaboko, nintoki.Keratinocytes ihindura imiterere uko uruhu rusaza, rukaba rugufi kandi rukabyibuha, mugihe keratinocytes iba nini kubera guhinduranya epidermal mugihe gito, igihe cyo kuvugurura icyorezo cya epidermis gisaza cyiyongera, ibikorwa byo gukwirakwiza selile epidermal bigabanuka, kandi epidermis iba yoroheje.inanutse, itera uruhu gutakaza elastique no kubyimba.
Kubera izo mpinduka zijyanye na morphologie, ihuriro rya epidermis-dermis ntabwo rikomeye kandi rishobora kwangirika kwingufu zo hanze.Umubare wa melanocytes ugenda ugabanuka buhoro buhoro nyuma yimyaka 30, ubushobozi bwo kwiyongera buragabanuka, kandi ibikorwa byimisemburo ya melanocytes bigabanuka ku gipimo cya 8% -20% kumyaka icumi.Nubwo uruhu rworoshye kutoroha, melanocytes ikunda gukwirakwira kwaho kugirango ibe ibibara, cyane cyane ahantu hagaragara izuba.Ingirabuzimafatizo za Langerhans nazo ziragabanuka, bigatuma imikorere yumubiri wuruhu igabanuka kandi ishobora kwandura indwara zanduza.
Uruhu anlayzerimashini irashobora gukoreshwa mugutahura uruhu rwuruhu rwo mumaso, imiterere, gutakaza kolagen, hamwe no mumaso kugirango bifashe kumenya uruhu rwo mumaso rusaza.
Igihe cyo kohereza: Gicurasi-12-2022
