Ubume lwesikhumba

Isikhumba lugubungela umzimba womntu evela ngaphandle, inika ukhuseleko onke amalungu angaphakathi kwiimpembelelo yangaphandle (ukukhuhlana, uxinzelelo, impembelelo, komsipha). Ngaphezu koko, ikhava kuthintela umthondo iintsholongwane ezahlukeneyo eziphilayo. nezinyuko zayo kwiindawo ezahlukeneyo iyahluka ukusuka 0.5 ukuya ku-4 eemilimitha ubunzima elisondeleyo-3 kg.

isakhiwo isikhumba ukuvumela ukuba bathathe inxaxheba kule exchange, excretory kunye neenkqubo zokhuseleko, kwakunye thermoregulation umzimba (ulawulo lobushushu). Kuyo yonke imini nge-inshorensi kumi nama-500 mililitha amanzi. Oku kumele-1% ye-emzimbeni wonke. isakhiwo Skin kubandakanya ukususa iimveliso protein ukutya kunye neetyuwa ezininzi. Cover ngokubamba ioksijini ize ikhuphe icarbon dioxide. Mineral, amanzi kunye nokhuseleko exchange gas ngogxininiso i rate obuphantsi kancinane pathways kuphela kwezihlunu nesibindi.

isakhiwo kwesikhumba yabantu kwenza umsebenzi alarm - oko kubangele ukuba kubekho amalungiselelo kuzo zonke maleko yayo receptors ezibuthathaka ngesixa-mali esikhulu. Ngoncedo aba bantu bayakwazi ukuqonda iintlungu, uxinzelelo, ubushushu, ngaphandle kwebala. isakhiwo isikhumba ikuvumela ibekwe kwiziza nangokwahlukeneyo Q1. cm. elinambini ngengqele, iintlungu emihlanu uxinzelelo thermal neziphelo amabini anamanci, amabini anamanci mabini ethe. Kufuneka kuqatshelwe ukuba ubukho uvakalelo wenza umsebenzi kubalulekile intsebenziswano yento ephilayo kunye nokusingqongileyo lwangaphandle, ukunqanda ukutsha, amanxeba, frostbite.

Isikhumba. Isakhiwo.

Kwindlela eqhelekileyo yokusebenza umzimba kuqinisekiswa ziimeko esisigxina yobukho. izinto ezingaphandle kakhulu eguqukayo kwaye ibe nempembelelo isigxina umntu. Ukuqinisekisa nokugcina isidima umzimba liphela lilele eseqweqweni umzimba engaphandle. Ubume isikhumba kunzima kakhulu. Le umzimba iqulathe ngeengcamba ezintathu.

Phezulu sangaphandle. It has a Ebubanzini ukususela 0.03 ukuya 1.5 eemilimitha okanye ngaphezulu (umz, ezintendeni okanye amathe). Yena, ke, lenziwa zihlanu. Umaleko kumphezulu (ezinawo) imelwe iiseli keratinized abafileyo, esinzulu ezikufutshane omnye komnye. Njalo kwi ngokwahlukana kwabo ozothatha iiseli ezintsha. Imisebenzi sangaphandle Protection. Nguye lowo uthintele impembelelo yeemeko zangaphandle emzimbeni. Ngenxa kulwakhiwo zabo, sangaphandle uye luthambe, amandla kunye luthambe. Ukongeza, yena nako ukuzifumana ngokukhawuleza iingozi ezincinane. Ngalinye zihlanu ekhulisa zibe omnye komnye, ngoko kukho uhlaziyo rhoqo. ukuhlaziywa ngokupheleleyo iiseli iintsuku 26-28. Bonke amalungu kuphela iiseli ulusu bayakwazi phinda kwaye sikhule ngesantya enjalo.

Umaleko elilandelayo polkrova engaphandle - dermis - zimelwe imicu munye. Ezona collagen kunye elastin (collagen kunye elastin na enkulu iiproteni noshowo kwesikhumba). Ngenxa nentlawulelo eyomelela, unako ukubuyisela imilo yayo yoqobo emva ekusoluleni. Kule dermis kukho maleko ezimbini. Nkovu kunye imithambo yegazi, izihlunu, imithambo-luvo, amadlala sebaceous kunye nokubila, iinwele uwele nwebu enzulu.

Phantsi dermis yi ezinamanqatha inyama ongama (hypodermis). Lo maleko luhlobo of "umqamelo". balo babulingana nesandla iyahluka, kuxhomekeke inxenye yomzimba. Oku kungenxa ubungqukuva iimilo zomzimba. Hypodermis ikhusela umzimba kusuka emzimbeni, ukwenzakala, zizinto zangaphandle, umaleko yokugcina, apho iivenkile ezityebileyo ifakwe ezisetyenziswa izifo, ukukhulelwa, indlala.

Phantse yonke indawo yesikhumba ibekwe kwamadlala ukubila. Abaninzi kubo phezu iibhola ze iinzwane kunye nezandla, ekuncothukeni kweentende zeenyawo, isundu, inguinal nezibaya axillary. Ezi luqinisekisa zinenxaxheba umsebenzi excretory.

Sebum - Secret secreted yi amadlala sebaceous. It yenza isikhumba inokusityeda, athambe.