Cov metabolism ntawm epidermis yog tias cov basal keratinocytes maj mam txav mus rau sab saud nrog rau kev sib txawv ntawm tes, thiab thaum kawg tuag los ua ib qho stratum corneum uas tsis yog nucleated, thiab tom qab ntawd poob tawm. Feem ntau nws ntseeg tias nrog kev nce hnub nyoog, cov txheej basal thiab cov txheej spinous tsis sib haum xeeb, qhov sib txuas ntawm epidermis thiab dermis ua tiaj tus, thiab qhov tuab ntawm epidermis txo qis. Raws li qhov thaiv sab nraud ntawm tib neeg lub cev, cov epidermis nyob rau hauv kev sib cuag ncaj qha nrog ib puag ncig sab nraud thiab yooj yim cuam tshuam los ntawm ntau yam sab nraud. Epidermal laus feem ntau yooj yim qhia txog kev cuam tshuam ntawm hnub nyoog thiab cov yam ntxwv sab nraud rau tib neeg laus.
Hauv daim tawv nqaij ntawm daim tawv nqaij laus, qhov sib txawv ntawm qhov loj me, morphology thiab cov yam ntxwv ntawm cov hlwb txheej basal nce ntxiv, qhov sib txuas ntawm daim tawv nqaij thiab dermis maj mam ua tiaj tus, tus ntsia hlau epidermal ua qhov ntiav dua, thiab qhov tuab ntawm daim tawv nqaij txo qis. Qhov tuab ntawm daim tawv nqaij txo qis kwv yees li 6.4% ib xyoo caum, thiab txo qis sai dua rau cov poj niam. Qhov tuab ntawm daim tawv nqaij txo qis nrog hnub nyoog. Qhov kev hloov pauv no feem ntau pom tseeb hauv cov chaw raug tshav ntuj, suav nrog cov nplaim extensor ntawm lub ntsej muag, caj dab, tes, thiab caj npab. Keratinocytes hloov pauv cov duab thaum daim tawv nqaij laus zuj zus, ua luv dua thiab rog dua, thaum keratinocytes loj dua vim yog qhov luv luv ntawm daim tawv nqaij hloov pauv, lub sijhawm rov ua dua tshiab ntawm daim tawv nqaij laus zuj zus, kev ua haujlwm ntawm cov hlwb epidermal txo qis, thiab daim tawv nqaij ua nyias dua. nyias, ua rau daim tawv nqaij poob elasticity thiab wrinkle.
Vim yog cov kev hloov pauv morphological no, qhov sib txuas ntawm epidermis-dermis tsis nruj thiab tsis yooj yim rau kev puas tsuaj los ntawm sab nraud. Tus naj npawb ntawm melanocytes maj mam txo qis tom qab hnub nyoog 30 xyoo, lub peev xwm proliferative poob qis, thiab cov haujlwm enzymatic ntawm melanocytes txo qis ntawm tus nqi ntawm 8% -20% ib xyoo caum. Txawm hais tias daim tawv nqaij tsis yooj yim rau tan, melanocytes feem ntau yuav loj hlob hauv zos los tsim cov xim pigmentation, tshwj xeeb tshaj yog nyob rau hauv thaj chaw raug tshav ntuj. Langerhans hlwb kuj raug txo qis, ua rau daim tawv nqaij tiv thaiv kab mob tsis zoo thiab yooj yim rau cov kab mob sib kis.
Cov tawv nqaij analyzerlub tshuab siv tau los ntes cov tawv nqaij ntawm lub ntsej muag wrinkles, kev ntxhib los mos, kev poob collagen, thiab cov duab ntawm lub ntsej muag los pab ntes cov tawv nqaij laus ntawm lub ntsej muag.
Lub sijhawm tshaj tawm: Tsib Hlis-12-2022
