Nrog kev laus, txheej txheej ntawm daim tawv nqaij (epidermis) thins, txawm tias cov txheej txheem ntawm tes tseem tsis hloov. Tus naj npawb ntawm cov pigment-muaj cov hlwb (melanocytes) txo qis. Qhov seem melanocytes loj tuaj. Cov tawv nqaij laus zoo nkaus li nyias, paler, thiab meej (translucent).
Puas cov tawv nqaij sib dua li lawv hnub nyoog?
Lawv pom: Forearm tawv nqaij sib dua hauv Asmeskas Neeg Asmeskas hnub nyoog ≥65 xyoo vs 18 txog 30 xyoo tab sis tsaus dua hauv Caucasians hnub nyoog ≥65 xyoo vs 18 txog 30 xyoo. Hauv African Asmeskas hnub nyoog 18 txog 30 xyoo, lub pob tw yog tsaus dua li ntawm lub hauv pliaj, whereas nyob rau hauv Caucasians lub pob tw yog sib dua li forearm.
Koj cov tawv nqaij puas tuaj yeem hloov pauv raws hnub nyoog?
Tib neeg cov tawv nqaij xim ploj mus nrog hnub nyoog. Tib neeg muaj hnub nyoog tshaj peb caug xyoo dhau los ntawm kev txo qis hauv melanin-tsim hlwb los ntawm 10% mus rau 20% ib xyoo caum raws li melanocyte qia hlwb maj mam tuag.
Peb puas tau ncaj ncees thaum peb muaj hnub nyoog?
peb cov hnub nyoog nees nkaum xyoo feem ntau yuav muaj, tab sis koj yuav tsis pom yog tias koj muaj tawv nqaij zoo. Txawm li cas los xij, yog tias koj muaj lub ntsej muag tsaus nti koj yuav luag yuav. Qhov no yog vim cov tawv nqaij tsaus muaj ntau melanin, uas yog qhov ua rau peb cov tawv nqaij xim av.
Vim li cas blondes muaj hnub nyoog nrawm?
Raws li New York tus kws phais yas yas Michael Sachs, lub hnub nyoog blondes nrawm dua brunettes, thiab cov poj niam xiav qhov muag muaj hnub nyoog sai dua cov poj niam xim av, vim "cov tawv nqaij tsaus tau tsim- nyob rau hauv lub hnub-filtering mechanisms, "thiab qhov tsaus qhov muag, qhov ntau tiv thaiv.
