Kodi khungu limapangidwa bwanji?
Kuyang'anitsitsa kapangidwe ka khungu kukuwonetsa zigawo zitatu zosiyana:
1. khungu la khungu，
2. dermis ndi
3. gawo la pansi pa khungu.
Dermis ili pamwamba pa subcutaneous layer ndipo makamaka imakhala ndi ulusi wotanuka, womwe umalukidwa mopingasa komanso mopingasa, zomwe zimaupatsa mphamvu zambiri. Mitsempha yamagazi imathera mu dermis, pomwe thukuta ndi ma sebaceous glands komanso ma follicles a tsitsi nawonso ali pamenepo.
Gawo la basal cell lili mu epidermis pakapita nthawi pakati pake ndi dermis. Gawoli nthawi zonse limapanga maselo atsopano, omwe amakwera mmwamba, amasalala, amakhala ozungulira ndipo pamapeto pake amachotsedwa.
Kodi kupukuta khungu ndi chiyani?
Ambiri a ife timaona kuotcha dzuwa ngati chinthu chosangalatsa kwambiri. Kutentha ndi kupumula zimatipatsa chisangalalo. Koma kodi kwenikweni chikuchitika ndi chiyani pakhungu?
Kuwala kwa dzuwa kumakhudza utoto wa melanin mu khungu la epidermis. Utoto uwu umadetsedwa ndi kuwala kwa UVA komwe kumaonekera mu kuwala. Utoto wa melanin umapangidwa ndi maselo apadera omwe ali mkati mwa khungu otchedwa melanocytes kenako amasuntha ndi maselo ozungulira kupita pamwamba. Utoto wakudawo umayamwa mbali ina ya kuwala kwa dzuwa motero umateteza zigawo zakuya za khungu.
UVB wa kuwala kwa dzuwa umalowa mkati mwa khungu ndipo umagwira ntchito pa melano-cytes yokha. Kenako izi zimalimbikitsidwa kuti zipange utoto wambiri: motero zimapangitsa kuti khungu likhale lofiirira bwino. Nthawi yomweyo, kuwala kwa UVB kumapangitsa kuti khungu likhale lolimba. UVB wokhuthalawu umathandiza kuteteza khungu.
Kodi ndi zotsatira zina ziti zomwe dzuwa limabweretsa kuposa dazi?
Mphamvu yotonthoza ya kuothera dzuwa sikuchokera ku kutentha ndi kupumula komwe kumachitika komanso ku mphamvu ya kuwala kowala; aliyense amadziwa chisangalalo chomwe tsiku lokha lachilimwe lokha limabweretsa.
Kuphatikiza apo, milingo yochepa ya UVB imalimbikitsa njira zamagetsi zomwe zimagwirira ntchito m'thupi ndipo imalimbikitsa kupanga Vitamini D3.
Motero dzuwa limabweretsa zotsatira zabwino zambiri:
1. kulimbitsa mphamvu zakuthupi
2. Kulimbitsa chitetezo cha thupi
3. kusintha kwa kayendedwe ka magazi
4. Kupititsa patsogolo mpweya wabwino m'thupi
5. kagayidwe kabwino ka mchere kudzera mu kagayidwe kabwino ka calcium
6. kupewa matenda a mafupa (monga osteoporosis, osteomalacia)
Kutentha ndi dzuwa ndi chizindikiro chotsimikizika chakuti khungu lakhala lowala kwambiri ndipo liyenera kupewedwa mosasamala kanthu za mtengo wake.
Kodi kuwala kwa dzuwa n'chiyani?
Kuwala - makamaka kuwala kwa dzuwa - ndi gwero la mphamvu lomwe popanda moyo silingathe kuganiza. Fiziki imalongosola kuwala ngati kuwala kwa electromagnetic - monga mafunde a wailesi koma pa ma frequency osiyana. Kuwala kwa dzuwa kumakhala ndi ma frequency osiyanasiyana omwe tingawaone pogwiritsa ntchito prism, yomwe ndi mitundu ya utawaleza. Koma ma spectrum satha pa red ndi blue. Pambuyo pa red pamabwera infra-red, yomwe timaiona ngati kutentha, pambuyo pa buluu ndi violet pamabwera ultra-violet, kuwala kwa UV, komwe kumayambitsa khungu kufiira.
Kuwotha dzuwa panja kapena ku solarium - kodi pali kusiyana?
Kuwala kwa dzuwa, kaya kumachokera pakhoma kapena mlengalenga, n'kofanana kwambiri. Palibe chinthu chotchedwa "kuwala kopangira" m'lingaliro lakuti ndi kosiyana kwambiri ndi kuwala kwa dzuwa. Komabe, ubwino umodzi waukulu wa ma sunbeds ndi wakuti zigawo za spectrum zimatha kusinthidwa moyenera kuti zigwirizane ndi zosowa za wogwiritsa ntchito. Kuphatikiza apo, palibe mitambo yotchinga dzuwa pa sunbed kotero mlingo wa cam nthawi zonse umadziwika bwino. Ndikofunikira kuonetsetsa kuti khungu silikudzaza ndi zinthu zambiri panja komanso pa sunbed.
Kupaka utoto popanda kutentha - kodi zimenezo zimagwira ntchito bwanji?
Kuwala kwa dzuwa, kuwonjezera pa zotsatira za kufiira zomwe mukufuna, kungayambitsenso kufiira kosafunikira pakhungu, erythema - m'malo mwake
Kupsa ndi dzuwa kamodzi kokha, nthawi yofunikira yopaka utoto wa khungu ndi yayitali kuposa nthawi yofunikira yopaka utoto wa khungu.
Ngakhale zili choncho, n'zothekanso kukhala ndi khungu labwino popanda kutentha - mwa kungowaza padzuwa nthawi zonse. Chifukwa cha izi ndikuti thupi limachepetsa magawo oyamba a kufiira kwa khungu mwachangu, pomwe khungu limadziunjikira nthawi zonse kudzera mu kuwonekera mobwerezabwereza.
Padzuwa, mphamvu yeniyeni ya kuwala kwa UV imadziwika. Chifukwa chake, dongosolo la kufiira kwa dzuwa likhoza kusinthidwa kuti zitsimikizire kuti munthuyo wasiya kuyaka asanayambe ndipo kenako khungu la dzuwa limakhala lofiirira bwino chifukwa cha kuwonekera mobwerezabwereza.