Letlalo batho mosebetsi

Mesebetsi ya letlalo tse fapa-fapaneng le ba tsohle phetha karolo ea bohlokoa ka phelang batho. Pele ho tsohle, sekoahelo sa eona ea rōna ea ho sireletsa 'mele. Letlalo - e mosa ea baka bothata pakeng tsa tsamaiso ea ka hare le linaha tse ling. Hore e re thusa ho sireletsa 'mele ho tloha fokotsa ho, matetetso le khatello, ke hore, litšusumetsong phetha molao feela. Boloka ya data ho re ka tlhaho 'me e akaretsa liphellong tsa lik'hemik'hale - acid le alkalis, ntle le bao ho seng theko, tsela ea rōna ea bophelo. Letlalo le re sireletsa litšusumetso bohloko a tikoloho (letsatsi, moea, mocheso le serame) hammoho le ho kenella ka hare ka 'mele oa likokoana-hloko le ho tšoaetsoa mafu a sa tšoaneng, mahlaseli le mahlaseli go la la.

Mechanical ho sireletsa mosebetsi oa letlalo ba phethahatsoa ka lebaka la bokhoni ba epidermis le ho tsosolosa, hammoho le ka lebaka la ho sebopeho rekere tsa dermis, 'me thepa e itseng ea faeba lona. Major seabo sebedisa ketso phethisa sireletsa lera ka holimo la sekoahelo sa eona rona tsa tlhaho. Matla le elasticity ea epidermis le e tiisa ka ho ba teng ka ho hlophisoa lona liprotheine le lipids. Dermis e sebediswa ho koahela hanyetsa tlhaho ho otlile ke bohato phetha molao feela.

E sireletsang mosebetsi bohlokoa tsa letlalo ke ho sireletsa 'mele liphellong tsa mahlaseli a kotsi. Ho phaella tabeng ea ho khanya ea letsatsi, susumetsa batho e na le mahlaseli a mahlaseli. The stratum corneum tsa letlalo e le ho sireletsa fofomoga pele liphellong tse fosahetseng tsa mahlaseli a kotsi. mahlaseli mahlaseli, ke ka e mengata e fapaneng itseng, etsang hore ho amohele molaetsa ho boemo ba epidermis le. Sena se ka etsa hore sunburn, 'me hamorao, le kankere. mahlaseli mahlaseli, e leng se ka phunyeletse ka le dikarolo tse tebileng tsa dermis e, ntlafatsa nahanela letsatsing le etsa hore ho tsofala pele ho nako ea sekoahelo ea tlhaho ea 'mele. Ka karabelo e sebopeho sa letlalo sunburn. Ka tsela eo e khōlō palo ya pigment hore monyang mahlaseli a ka mefuta e fapaneng e fapaneng. mala oa letlalo ka nako e tšoanang ho fetola ho le leso kudu. Ka tsela eo, lisele tsa 'mele tse sireletswa ho insolation phahameng.

Mosebetsi oa letlalo le kena 'mele le kabelo phapanyetsano khase. Ka le dikarolo tsa tlhaho koahela sekoahelo ka phunyeletse oksijene, ammonia, carbon dioxide le sulfide hydrogen. Ntlheng ena, ho sebetsa ho hema tsa letlalo e elwa hloko nakong mekgwa ya tshebetso le setlolo. E lokela ho jere hopola ha nka libaka tsa ho tola le ho sebedisa bakeng sa kalafo ya seretse folisa.

Letlalo ke le boikarabelo ba ho boloka thermoregulation ea 'mele ea hape. Bobeli mariha le lehlabula ka lebaka la ho boemong ba hae ba mocheso ha a fetohe le ke ho pota 36,6 likhato.

Ho kenella ka hare ka metjha e moriri mafura le tse fapa-fapaneng likarolo lik'hemik'hale kenyelelitsoe mosebetsi le phepo e nepahetseng ea letlalo. Tsobotsi ena e kenyelelitsoe a ntshetsopele ya setlolo kerime le tharollo. Meroho oli le mafura a liphoofolo, a tlatsana le motsoako le divithamini kenyelelitsoe lithethefatsi li kena epidermis le ka ho phello ea oona ho phekola.

Ka mesebetsi ea letlalo batho kenyeletsa le matla a ho hloekisa ka boeona. Karolo e phethoang sehloohong sena ke ea mofufutso le litsoelesa sebaceous, eo ka eona 'mele o ntša ba bang lihlahisoa tse kotsi tsa metabolism (urea, ammonia, joalo-joalo).