Ubuncwane bentloko luhlobo oluthile lokugcina impahla oluqulethe iiseli kunye nezicubu ezixhamlayo kwaye zijikeleze ingcambu yeenwele. Kukho ngaphakathi kwidermisi kunye ne- epidermis , iindawo eziphezulu zesikhumba. Ukuze ubone okubonakalayo, cinga ngeentlanzi zentloko njenge-vase kunye neenwele njengesiqhamo sentyatyambo.
Isakhiwo seenwele zezinwele zilula kwaye zichanekileyo, kodwa imisebenzi yayo kunye nomjikelezo wayo wokukhula unzima kakhulu.
Naluphina utshintsho oluphawulekayo kumjikelezo oqhelekileyo wokukhula kwentliziyo yezinwele kunokukhokelela kwimeko yeenwele ezifana ne- alopecia areata okanye i- telogen effluvium .
Ukwakhiwa kweeNwele zeNwele
Izintlu zezinwele zenziwe ziinkalo ezininzi ezahlukeneyo, kodwa ezi zizakhiwo ezine eziphambili.
Papilla
I-papilla yenziwe ngamathambo axhamlayo kunye nemithambo yegazi ekhuthaza iinwele ezikhulayo. Kukho kwisiseko senwele yentloko.
Germinal Matrix
I-matrix ye-germination, ebizwa ngokuba yi "matrix," apho iiseli zivelisa iinqwelo ezintsha njengoko iinwele zifa kwaye ziyawa. Kwakhona kufumaneka kwingingqi ephantsi yentolisi yeenwele.
Ibha
I-bulb yenziwe nge-bulb, ejikelezweyo kwinqanaba elingaphantsi kweentloko zezinwele "ukugcina izinto" ezijikeleze i-papilla kunye ne-matrix yezilwanyana kwaye inondliwa yimithambo yegazi. Le nxalenye ephilileyo yeenwele. Enyanisweni, iinwele ezibonakalayo ngaphezu kwesikhumba zifile.
I-bulb inamanani amaninzi eeseli ezinamaqabunga ahlula onke ama-23 ukuya kuma-72 iiyure, ngokukhawuleza kunamanye amangqele omzimba. I-bulb iqulethe i-hormone echaphazela ukukhula kweenwele kunye nesakhiwo ngexesha leendlela ezahlukeneyo zobomi, njengokuba ngethuba lokukhulelwa nangesikhathi sokukhulelwa.
Bulge
Indawo yecala iphakathi kwendawo ephakathi (eyaziwa ngokuba yi-isthmus) yentloko yeentloko.
Iqulethe iiseli ezinamaqhekeza ezahlula kwaye ziphinde zihlaziyeke nje kuphela iintlobo zeentloko zezinwele kodwa izilonda ze-sebaceous kunye ne-epidermis, nayo.
I-bulge inikezela nenqaku lokufakela kwi-second arrector-ibinzana elincinci leesisipha. Ukuqhawulwa kwezi zihlunu kubangela ukuba iinwele zime ekupheleni xa ufumana i-goosebumps.
I Cycle Growth Cycle
Isantya apho iinwele zikhula zihluka ukusuka kumntu ukuya kumntu, kodwa izinga lokukhula lokulinganisa lilingane nesiqingatha intshi nganye ngenyanga okanye ezintandathu intshi ngonyaka. Umjikelo wokukhula kweenwele uhlukaniswa zibe zigaba ezintathu: i-anagen, i-catagen kunye ne-telogen. Nazi ezinye iinkcukacha malunga nesigaba ngasinye.
Anagen
Esi sisigaba sokukhula. Isigaba se- anagen kwiintlobo eziqhelekileyo zeenwele ze-scalp zithatha iminyaka engama-2 ukuya kweyesithandathu, kanti iinwele zentloko zihlala malunga neentsuku ezingama-70 kwisigaba se-anagen.
Izinwele zeAnagen ziyahluka ngobukhulu, ukusuka kwixesha elide, ezinobunzima beenyawo ezifutshane, ezinemibala emhlophe. Amahomoni okwandisa ngexesha lokutshatshaza aphendule iinwele ze-vellus zibe ziinwele ezinqabileyo.
Catagen
Esi sisigaba sokulawula. Ngaphezulu kweeveki ezimbalwa, izinga lokukhula kweenwele linciphisa kwaye i-follic folly iyancipha. Isigaba sentshukumo siphelela ezimbini ukuya kwiiveki ezintathu.
Telogen
Esi sisigaba sokuphumla, esihlala malunga neenyanga ezintathu.
Emva kweenyanga ezimbalwa, iinwele ziyeka ukukhula kunye neengcambu ezivela kwintliziyo yezinwele. Izinwele ezintsha ziqala ukukhula kwaye zinyusa i-old, dead hair.
Ngexesha lexesha loxinzelelo, iinwele ezininzi zingena kwisigaba se telogen kwaye ziqala ukuphuma. Abantu baphala kwiindawo ze-scalp kwi-50 ukuya kwe-100 ngosuku, kodwa ingcinezelo ingabangela ukulahleka kweenwele.
> Imithombo
> I-American Academy yeDermatology. Indlela Ubunzima Bonyuka Ngayo.
> Breitkopf T, Leung G, Yu M, Wang E, McElwee KJ. Isisayensi esisiseko yezinto zezinwele zezinwele: Ziziphi iindlela zokwenza iifolisi zentlungu ezidibeneyo? KwiDermatol Clinic . 2013 Jan; 31 (1): 1-19.
> U-Ohyama M. Ubungqina bentloko: into ekhangayo yamaseli e-epithelial cells. J Dermatol Sci . 2007 ngoMeyi; 46 (2): 81-9.