Isakhiwo isikhumba

Isikhumba ihlanganisa umzimba womuntu kusukela ngaphandle, ihlinzeka ukuvikeleka kwabo bonke izitho zangaphakathi emathonyeni yangaphandle (friction, ingcindezi, umthelela, ukudabuka). Ngaphezu kwalokho, ikhava evimbela Ukungena amagciwane ezahlukene umzimba. Uhlonze lwalo ezindaweni ezahlukene kuyehluka kusuka 0.5 kuya 4 kwangu isisindo silinganisiwe 3 kg.

isikhumba isakhiwo kuyivumela iqhaza exchange, excretory nezinqubo zokuzivikela, kanye thermoregulation umzimba (lokushisa isiqondiso). Usuku lonke ngokusebenzisa isembozo imele cishe 500 namamililitha yamanzi. Lokhu kusho ukuthi bangaba 1% emzimbeni Imininingwane. Skin isakhiwo kuhilela nokususa imikhiqizo wamaprotheni umzimba nosawoti ahlukahlukene. Cover ubamba oksijini, ukukhulula-carbon dioxide. Amaminerali, amanzi kanye nekhava negesi lokushintshisana ngu umfutho kuphela kancane phansi kunabaphostoli rate umzimba ezicutshini futhi isibindi.

womuntu isikhumba isakhiwo kwenza umsebenzi alamu - it is uma wahlela yonke Icwele receptor sensitive esiningi. Ngosizo laba bantu uyakwazi ukubona ubuhlungu, ingcindezi, ukushisa, thinta. isikhumba isakhiwo ivumela sise amasayithi ahlukene Q1. cm. kuya eziyishumi nambili zakwa-abandayo, yobuhlungu amabili namashumi: amashumi amabini anamabini ingcindezi ezinhlanu ezishisayo eziyimpumelelo ebucayi. Kufanele kuqashelwe ukuthi khona ukuzwela wenza umsebenzi ebalulekile ekuxhumaneni umzimba kanye imvelo bangaphandle, ukuvimbela ukusha, izilonda, frostbite.

Isikhumba. Ukwakheka.

Ukusebenza evamile umzimba liqinisekiswa izimo kwendaba. izici bangaphandle ngempela oluyingozi futhi ube nomthelela unomphela umuntu. Ukuqinisekisa nokugcina ubuqotho umzimba wonke amanga yangaphandle ikhava umzimba. Isakhiwo isikhumba kunzima ngempela. Lokhu umzimba yakhiwa izingqimba ezintathu.

Phezulu iyona epidermis. It has a ukushuba kusuka 0.03 kuya 1.5 kwangu noma ngaphezulu (isib ku izintende noma amathe). Yena, siqukethe izingqimba ezinhlanu. Isendlalelo ebusweni (stratum) limelelwa amangqamuzana afile keratinized, uvalwe eduze komunye nomunye. Ilokhu kwenzekani bahlale ngokwahlukana futhi esikhundleni amangqamuzana amasha. I epidermis Ukuvikelwa imisebenzi. Kuyinto lowo kuvimbela kwethonya izici zangaphandle emzimbeni. Ngenxa isakhiwo yabo, epidermis has kuyaqina, amandla kanye kuyaqina. Ngaphezu kwalokho, uyakwazi alulame ngokushesha bathola imihuzukwana. Ngamunye izingqimba ezinhlanu ukuvuthwa ku komunye nomunye, ngakho kukhona update njalo. olusha ngokugcwele amaseli izinsuku 26-28. Bona zonke izinhlaka kuphela ngokusebenzisa amangqamuzana esikhumba somuntu bayakwazi ukuba azale ande sikhule ngesivinini enjalo.

Isendlalelo esilandelayo polkrova yangaphandle - dermis - emelelwa Imicu yotshani munye. Khona-ke abakhululiwe eziyinhloko-collagen futhi mithambo ine-elastin (collagen futhi mithambo ine-elastin kuyizinto ezinkulu amaprotheni kwesakhiwo isikhumba). Ngenxa ikhava zabo uyakwazi ukubhekana nezimo ezinzima, ukwazi ukubuyisela ezakheke yokuqala ngemva ngilulekela. Ngo dermis kukhona izingqimba ezimbili. Lymph kanye igazi izitsha, imisipha, imizwa, izindlala sebaceous kanye umjuluko, unwele udabula ungqimba ejulile.

Ngaphansi dermis kuyinto le ongama okunamafutha izicubu (hypodermis). Lesi sendlalelo uhlobo "isiguqo". Uhlonze lwalo kuyahlukahluka, kuye ngezici ingxenye yomzimba. Lokhu kungenxa roundness bobunjwa umzimba. Hypodermis ivikela umzimba kusuka hypothermia, ukulimala, ezenzeka ngaphandle, ungqimba isitoreji, lapho imali ezitolo amafutha Consumables izifo, ukukhulelwa, indlala.

Cishe zonke indawo isikhumba elise umjuluko nezindlala. Iningi lazo phezu amabhola we izinzwane nezandla, amathe, izintende, inguinal futhi axillary emphethweni. Lezi nezindlala zinengxenye umsebenzi excretory.

Sebum - Imfihlo ethakwa by the nezindlala sebaceous. Kwenza isikhumba zazivuma, ukuthambisa ke.