Terminal Hair vs Vellus Hair
Terminal plaub hau thiab vellus plaub hau yog ob hom plaub hau, paub dab tsi yog plaub hau yog qhov tseem ceeb rau kev nkag siab zoo ntawm qhov sib txawv ntawm cov plaub hau plaub hau thiab vellus plaub hau. Lub xub ntiag ntawm cov plaub hau yog suav hais tias yog ib tug tshwj xeeb mammalian yam ntxwv feature. Cov plaub hau (cov plaub hau fibers) yog cov qauv tuag tsim los ntawm keratin proteins thiab nyob rau hauv cov raj zoo li hollows hu ua plaub hau follicles. Keratin proteins embedded nyob rau hauv ib tug amorphous matrix los tsim cov plaub hau fibers. Muaj peb hom plaub hau; lanugo plaub hau, vellus plaub hau, thiab cov plaub hau terminal. Lanugo cov plaub hau tsuas yog pom ntawm fetus thiab me nyuam mos, thiab los tom qab los yog ua ntej yug. Cov plaub hau khaws cia thaum lub hnub nyoog laus yog vellus thiab terminal plaub hau. Cov plaub hau yog qhov tseem ceeb rau thermoregulation ntawm cov tsiaj nyeg. Cov plaub hau ua ib qho insulator thaum lub caij ntuj sov ib puag ncig thiab tseem tiv thaiv daim tawv nqaij los ntawm UV teeb. Tag nrho cov hauv paus plaub hau muaj peev xwm tsim tau vellus lossis terminal plaub hau thiab qhov peev xwm no txawv nrog lub hnub nyoog, noob caj noob ces thiab cov tshuaj hormones.
Cov plaub hau Terminal yog dab tsi?
Cov plaub hau ntev ntev, coarser, pigmented thiab pom ntawm ob txhais ceg, caj npab, thiab tawv taub hau ntawm txiv neej thiab poj niam. Thaum puberty, cov plaub hau davhlau ya nyob twg pib loj hlob nyob rau hauv puab tais thiab maxillae ntawm ob leeg txiv neej thiab poj niam, thiab kuj nyob rau ntawm lub ntsej muag ntawm cov txiv neej. Tsis zoo li lwm hom plaub hau, cov plaub hau davhlau ya nyob twg muaj medulla thiab tuaj yeem pom tau yooj yim vim nws cov xim tsaus. Nyob ntawm qhov chaw thiab kev ua haujlwm, qhov loj thiab cov duab ntawm cov plaub hau davhlau ya nyob twg txawv. Terminal plaub hau pom nyob rau ntawm tawv taub hau muaj peev xwm muab kev tiv thaiv tiv thaiv UV teeb thaum lub davhlau ya nyob twg cov plaub hau pom ntawm pob muag thiab plaub muag tiv thaiv kev nkag mus ntawm cov plua plav thiab kua hauv qhov muag. Tsis tas li ntawd, cov plaub hau qhov ntswg tiv thaiv kab thiab lwm yam khoom siv hauv huab cua nkag mus rau hauv qhov ntswg.
Vellus Hair yog dab tsi?
Vellus cov plaub hau yog mos, zoo, tsis hloov pauv, thiab cov xim tsis zoo thiab npog tag nrho lub cev tsuas yog xib teg, txhais taw, daim di ncauj thiab qhov chaw mos. Cov poj niam muaj plaub hau vellus ntau dua li txiv neej. Vellus plaub hau muaj ntau heev rau cov menyuam mos thiab menyuam yaus. Thaum lub hnub nyoog laus, feem ntau ntawm cov plaub hau vellus yog hloov los ntawm cov plaub hau.
Qhov txawv ntawm Terminal Hair thiab Vellus Hair yog dab tsi?
• Vellus cov plaub hau yog cov plaub mos mos mos thiab tsis muaj xim tsis zoo, thaum cov plaub hau terminal yog coarser thiab zoo-pigmented.
• Cov plaub hau Terminal ntev dua vellus plaub hau.
• Txoj kab uas hla ntawm lub davhlau ya nyob twg cov plaub hau feem ntau yog ntau tshaj 60 μm, thaum cov plaub hau vellus tsawg dua 30 µm.
• Vellus plaub hau muaj nyob rau ntau qhov chaw tshwj tsis yog xib teg, txhais taw, daim di ncauj thiab qhov chaw mos, qhov chaw cov plaub hau muaj nyob ntawm tawv taub hau, hauv qab caj npab, hauv thaj tsam pubic thiab qee qhov ntawm daim tawv nqaij.
• Terminal plaub hau follicles pom tob hauv lub dermis thiab lawv cov qij nkag mus rau subcutaneous rog txheej. Tsis zoo li cov plaub hau plaub hau, vellus plaub hau follicles nkag mus rau reticular dermis thiab tsis ncav cuag subcutaneous rog txheej.
• Terminal plaub hau muaj medulla, whereas vellus plaub hau tsis.
• Hauv qee thaj chaw, cov plaub hau vellus tau hloov nrog cov plaub hau plaub hau vim yog kev hloov pauv hormonal tshwm sim thaum lub hnub nyoog laus.
