Izinwele ziyinkimbinkimbi kakhulu kunalokho kubonakala. Kuyasiza ukudlulisa ulwazi lwezinzwa. Isebenza njengesivimbela izinhlayiya zangaphandle. Ingxenye ebalulekile yokubukeka futhi idala ubunikazi. Kubuye kube nesakhiwo somzimba kuphela esingakwazi ukuzivuselela ngokuphelele ngaphandle kokushiya. Kunezinwele cishe cishe yonke indawo yomzimba womuntu. Nansi ukubuka konke okuphelele kwe-biology, isakhiwo, nokusebenza kwayo.
Indlela amafomu ezinwele
I-fetus esathuthuka inezinwele zayo zonke ezakhiwe ngesonto 22. Ngalesi sikhathi, kunezinhlobo eziyizigidi ezingu-5 ze-follicles emzimbeni. Isigidi esisodwa salezo zikhona ekhanda futhi ezingu-100,000 zikhona esikhwameni. Lona inombolo enkulu kunazo zonke izinwele zezinwele umuntu ozothola ngoba izintambo aziqhubeki ukukhula ngesikhathi sokuphila. Njengoba sikhula, ubukhulu bezinwele zezinwele buyancipha.
Anatomy
Umdwebo we-anatomy wezinwele ungase ubheke ngokuqondile, kodwa empeleni ungenye yezakhiwo eziyinkimbinkimbi kakhulu emzimbeni. Izinwele zakhiwe ngezakhiwo ezimbili ezihlukene: izinwele zezinwele, ezikhona ngaphansi kwesikhumba, kanye ne-shaft hair, okuyinto izinwele esizibonayo.
I-Follicle Yezinwele
I-follicle yezinwele yingxenye ephilayo yezinwele. Isakhiwo esifana nesitokisi esiqukethe amaseli nezicubu ezixhunyiwe. I-papilla ikhona phansi kwe-follicle yezinwele. Iqukethe imithambo yegazi encane (i-capillaries) eyondla amangqamuzana.
I-follicle iqukethe i-matrix yegciwane, okuyilapho amaseli enza khona izinwele ezintsha.
I-bulb isakhiwo esifana nesitokisi esizungezile i-papilla kanye ne-matrix yezimila. Yondliwa ama- capillaries . I-bulb iyikhaya ezinhlobonhlobo zezinqamuzana ze-stem ezihlukanisa amahora angu-23 kuya kwangu-72, ngokushesha kunanoma yimaphi amanye amaseli emzimbeni.
Ibuye iqukethe ama-hormone athinta izinwele ukukhula kanye nesakhiwo ngezigaba ezahlukene zokuphila, njengokukhulelwa.
I-follicle ihambele umgogodla ongaphakathi nangaphandle ovikela futhi ubophe isikhwama sezinwele esikhulayo. Ingxenyeni yangaphakathi ilandela i-shaft yezinwele futhi iphela ngaphambi kokuvulwa kwegciva le-sebaceous . Ingxenyeni yangaphandle iqhubeka yonke indlela kuze kube segcekeni le-sebaceous. I-arrector second muscle, isikhwama esincane se-muscle fiber, sinamathele emgodini ongaphandle. Lapho izinkontileka zemisipha, kubangela izinwele ukuba zime, okungaziwa ngokuthi i-goosebumps. I-sebaceous gland ikhiqiza i-sebum, noma amafutha, okuyi-conditioner yemvelo yomzimba. I-sebum eyengeziwe ikhiqizwa ngesikhathi sokukhulelwa, yingakho ama-acne ejwayelekile phakathi neminyaka eyishumi. Ukukhiqizwa kwe- Sebum kunciphisa ngeminyaka yobudala, okwenza isikhumba sibe somile.
Hair Shaft
Izinwele zezinwele-izinwele esingazibona-empeleni zifile. Yakhiwa izingxenye ezintathu ze- keratin , amaprotheni aqine. Nazi imininingwane eminingi ngalezo zigaba ezintathu.
- Ingqimba engaphakathi: Lokhu kubizwa ngokuthi i-medulla. Kuye ngohlobo lwezinwele, i-medulla ayikho njalo.
- Isendlalelo esiphakathi: Lokhu kubizwa ngokuthi i-cortex, eyenza iningi le-shaft yezinwele. Kokubili i-medulla ne-cortex ziqukethe amaseli e-pigmenting anesibopho sokunikeza umbala wezinwele.
- Ingqimba engaphandle: Lokhu kubizwa ngokuthi i-cuticle, eyakhiwa izikali ezinamathele ezimweni ezithintekayo ezifana nezindwangu zokuphahla. Imikhiqizo eminingi yokubeka izinwele iklanyelwe ngisho nangaphandle kwe-cuticle ngokukhipha isakhiwo sayo.
Umjikelezo Wokukhula
Izinwele ezisekhanda zikhula cishe isigamu semilimitha ngosuku-cishe ama-intshi angu-6 ngonyaka. Ngokungafani nezinye izilwane ezincelisayo, ukukhula kwezinwele nokulahleka kungenangqondo futhi akuyona inkathi noma yonyaka. Izinwele zihlala zikhona ngezigaba ezihlukahlukene zokukhula futhi zichithe noma nini. Kunezinyathelo ezintathu zokukhula kwezinwele: i-anagen, i-catagen, ne-telogen.
- Isigaba 1: Isigaba se-anagen yisigaba esisebenzayo noma sokukhula kwezinwele. Izinwele eziningi zikhula njalo futhi zichitha iminyaka emithathu kuya kwezine kulesi sigaba. Amafomu amasha wezinwele futhi aphonsela izinwele zekhanda phezulu futhi ziphume kobuciko. Phakathi nalesi sigaba, izinwele zikhula cishe u-1 cm emalanga angu-28. Abanye abantu banenkinga yokukhulisa izinwele zabo ngaphezu kwesikhathi eside ngoba banesigaba esifushane sama-anagen. Ngakolunye uhlangothi, abantu abaneswele eside kakhulu futhi abanenkinga yokukhula izinwele banesigaba eside se-anagen. I-anagen isigaba se-eyelashes, amashiya, nezinwele zomlenze nezandla nazo zifushane kakhulu-cishe izinsuku ezingu-30 kuya kwezingu-45-ezichaza ukuthi kungani lezi zinwele zifushane kakhulu kunezinwele ze-scalp.
- Isigaba sesi-2: Isigaba se-catagen yisigaba sokushintsha, futhi u-3% wazo zonke izinwele zikhona kulesi sigaba nganoma yisiphi isikhathi. Iphela amasonto amabili kuya kwamathathu. Ngalesi sikhathi, ukukhula kuyancipha futhi ingcambu yangaphandle iyancipha futhi ifaka emmpandeni wezinwele, ekwakheni lokho okubizwa ngokuthi izinwele zeqembu.
- Isigaba sesi-3: Isigaba se-telogen yisigaba sokuphumula, esihlala cishe izinyanga ezintathu futhi u-10% kuya ku-15% wazo zonke izinwele. Phakathi nalesi sigaba, izinwele zezinwele ziphumule futhi izinwele zeqembu zakhiwe ngokuphelele. Ukudonsa izinwele kulesi sigaba kuzoveza izinto eziqinile, ezomile, ezimhlophe empande. Umzimba ubeka izinwele ezingaba ngu-50 kuya kwezingu-100 ngosuku.
Indlela Ezuza Ngayo Umumo
Abanye abantu baye bagqoke izinwele zezinwele, kanti ezinye zinezinwele ezinzima, eziqondile, ezikhanyayo. Ukubukeka kwemvelo kwezinwele kubhekwa ukuma kwezinwele. Inani le-curl yemvelo inwele linqunywa ngokuma kwesigaba sayo. Izinwele eziqondile zinokuzungeza kakhulu. Izinwele ezinama-curly noma ezinama-kinky ziyi-flat. Uma isiyindilinga ngaphezulu, i-shaft shaft, i-straighter izinwele. I-flatter i-shaft, i-curter izinwele.
Ukuma kwesigaba esiphambene uma izinwele zikhomba ukuthi inani lezinwele likhanye kangakanani. Izinwele eziqhamukayo ziyiziqhumane ngoba i-sebum ephuma emthonjeni we-sebaceous ingahamba phansi kalula izinwele. I-kinkier izinwele, ubunzima obuningi be-sebum buhamba phansi izinwele, futhi uma omile futhi obomvu izinwele zibukeka.
Futhi izinwele zakho zingashintsha umbala, ukuthungwa nokuqina (futhi indawo yayo ingashintsha-kakhulu kakhulu ezindaweni ezithile futhi encane kakhulu kwabanye) ngokuhamba kwesikhathi njengoba ukhula .