Isakhiwo izinwele

Uma ucabangela isakhiwo unwele lomuntu, zikhona ezintathu izinhlobo izinwele :

- imibungu (kokubeletha);

- vellus;

- Intermedia (zesikhashana);

- bristly futhi eside (ukuphela).

Vellus futhi lwegciwane abanalo sombala. Basuke kwakhiwa esibelethweni. Ngaphambi kokuzalwa inguquko ivele izinwele esikhunjeni. Phakathi neminyaka yokuqala ezintathu umzimba wengane embozwe ukukhanya, elithambile vellus izinwele. By isigaba sokuba umuntu omdala , ziba stiffer, iqala ukuba ikhule ibe imbilapho, emakhwapheni, amadoda - umzimba nobuso. izinwele Bristly ukuthuthukisa ku Isivalo, amashiya, amakhala. Sezinwele emelelwa zonke izinhlobo.

Nesakhiwo follicle izinwele kuhlanganisa nenduku. Izimpande ukunweba kusukela izicubu adipose ongama ngokusebenzisa dermis kuya epidermis. Ngesikhathi besanda kuqala izinwele zikhula zibheke ngakhona ke itholakala dermis. Impande iqukethe isibani ewugqinsi kubekwe phakathi follicle.

Isakhiwo kuyivumela ukhule izinwele njalo kuguculwa yi-keratin kancane kancane ezihambayo kwangaphandle ngefomu intambo. Izinga ukukhula ngelanga cishe kusukela 0.2 kuya 0.4 mm ngosuku.

Isakhiwo kuhlanganisa izinwele dermal papilla lapho amandla avela isimiso sokujikeleza kwegazi.

Follicle futhi isibani ingakulahlekela ngenxa umthelela ngokomzimba, futhi umthelela izingxenye anobuthi, okuyinto uthole empandeni ngaphandle nge imfihlo, ekhiqizwa nezindlala sebaceous.

It kunqoba nengaphakathi isikhumba. Isakhiwo izinwele engxenyeni emelelwa izingqimba ezintathu.

I yangaphandle (cuticle) inikeza imisebenzi Ukuvikelwa. Isakhiwo izinwele kule ungqimba ezondile amaseli uvezwa uhlobo ishq, agqagqene nomunye. Lapho izikali efanelekayo olunembile naseduze, izinwele esithambile, abushelelezi. Uma kukhona umonakalo cuticle (amakhemikhali noma ngokomzimba), bona (izinwele) sebeqala kudidaniswe, babe ziyaqothuka, ulahlekelwe ayebuthaka yabo.

Isendlalelo phakathi ngokuthi fibrous. Siqukethe yi-keratin zesivikelo sesifuba. Lesi sendlalelo ubhekwa isakhiwo izinwele eziyisisekelo, ngoba kukhona wenza chemical izinqubo (for wendiza, ukudaya).

Isendlalelo wesithathu kuyinto tube ozwakala. Hhayi ezikhandla yimiphi tinchubo akunamthelela, kuba ngingekho abantu abaningi.

Umjikeleto ephelele ukwakha izinwele umnyuziki kuhilela lwaluyoba nezigaba ezintathu: anagen, telogen, catagen.

Ngesikhathi sigaba sokuqala, esebenzayo cell division - a lwe-mitosis. melanin Ngakho, kwakheka amangqamuzana amasha akhiwa kushaft izinwele (sombala). izingxenye Kugcine, kuhlanganise ngqo isakhiwo, inikeza umbala. Active ukukhula esigabeni ihlala iminyaka emibili kuya eziyisikhombisa.

Esigabeni esilandelayo (catagen esiteji) iyeke ukuhlukana amaseli bese izinwele zikhula zibheke ngakhona. Lo mbala ngaleyo ndlela futhi uqeda lasungulwa. Kulesigaba follicle uqala wehlise, onion - ukuze udlulele epidermis. Lesi sigaba sithatha amasonto ambalwa.

Esigabeni yokugcina kumiswa ithatha cishe izinyanga ezintathu. Esigabeni telogen ukukhula izinwele eyeka ngokuphelele, follicle uya esimweni ukuphumula. Esigabeni lesi, izinwele kungaba ekhishiwe kalula noma umane nekama ukuwa. Ngu kwezulu afake kanye kumiswa intambo entsha. Ukuqala ukukhula asebenzayo senzeka follicle efanayo. Sikwazi ukukhula cishe abangamashumi amabili kuya amathathu izinwele entsha kuwo.

Zonke izigaba ezichazwe ngenhla zenzeka nsuku zonke. Ngo izinwele kwabanye bazalwa, bakhulela, ziphume ngokushesha kunezinye. Inani eliyisilinganiso follicle ekhanda lomuntu angaba yizinkulungwane 100. Ngesikhathi esifanayo mayelana 10% of them are in a state of ukuphumula.

Izinwele iqukethe ikakhulukazi yi-keratin. Futhi khona futhi abanye inani lamanzi, izingxenye amaminerali, ekhona emzimbeni.

Ukuze alondoloze izinwele amashampu ekhethekile kuphela ngokwanele ukusebenzisa abaphile kahle, buso noma balms. Ukuze ukwakheka zabo kuyadingeka futhi ecebile amaprotheni, amavithamini, iodine, nensimbi, kanye nezinye izingxenye ukudla.