Dab tsi cov hlwb npog ntawm qhov tawv nqaij? Cov tawv nqaij tawv

Nyob rau hauv daim ntawv no peb qhia mus tham txog dab tsi lub hlwb npog qhov chaw ntawm daim tawv nqaij. Yuav ua li cas yog ntawm daim tawv nqaij, thiab los ntawm uas nws yog tsim los ntawm khaubncaws sab nraud povtseg. Yuav pib nrog, nws ua tau ntau yam sib txawv, ntawm cov uas:

• Kev Zoo Nkauj;
• Kev tiv thaiv tawm tsam kev puas tsuaj;
• Kev tiv thaiv thaiv thermal puas;
• Kev tiv thaiv tawm tsam kev puas tsuaj;
• Kov;
• Txhim kho nrog cov pa oxygen.

Pom zoo, tag nrho cov no yog qhov tsim nyog rau peb lub neej. Cov tawv nqaij muaj ob peb txheej: epidermis, dermis thiab hypodermis. Niaj hnub no, peb yuav tshwj xeeb tshaj yog them nyiaj rau lub uppermost txheej - lub epidermis. Xav txog cov khaubncaws sab nraud povtseg kws ua rua lub thaaj xaav, qhov tuab tuab, hab ntev npaum le caag kws muaj peev xim rov tuaj.

Epidermis

Li ntawd, cov hlwb uas npog cov tawv nqaij? Cov hlwb no yog cov txheej txheem ntawm cov kab mob. Peb pom nws, nws yog ib qho horny txheej. Qhov no yog ib lub plhaub tsis sib haum, nws thiaj li peels tawm, uas yog tag nrho tuag. Hauv cov epidermis muaj cov hlab ntsha tsis meej kiag li. Tab sis nyob rau hauv qhov tob ntawm no txheej yog nyob hlwb. Lawv sib faib thiab maj mam ua lawv txoj kev mus rau txheej txheej, lub hlwb yeej tuag thiab tig mus rau hauv cov teev.

Hauv qab txheej no, dej tuaj yeem tsis tau poob, tiam sis rog-soluble puav penetrate suab tsis muaj teeb meem. Vim li cas qhov no tshwm sim? Cov qoob loo ntawm lub hlwb yog ua los ntawm cov rog, lawv muaj peev xwm dissolve lwm tus.

Cov kaus mom ntawm cov kab mob epidermis

Zoo li lwm yam plab hnyuv siab raum, peb cov tawv nqaij yog tsim los ntawm cov hlwb. Tam sim no peb yuav tsom xam cov hlwb uas npog lub tawv ntawm daim tawv nqaij, uas yog, los ntawm cov tshuaj tua kab mob li cas.

Thawj cov khoom muaj nqis piv txwv yog keratinocytes, uas tsim keratin. Lawv muab faib ua peb pawg:

• Spiny;
• Basal;
• Granular.

Keratinocytes yeej ib txwm nyob hauv cov lus tsa suab, lawv txav raws cov khaubncaws sab nraud povtseg ntawm cov tshuaj tua kabmob (epidermis), sim kom tau tawm mus rau txheej txheej. Thaum lub sij hawm no, ib qho protein ntau, keratin, yog ua. Thaum lawv poob lub nucleus, lawv ua zoo li lub hnab, tam sim no lawv yog hu ua corneocytes. Thaum lub hlwb ncav cuag saum, lawv tsuas yuav poob, thiab lub keratinocyte tom ntej yuav tuaj rau ntawm qhov chaw no. Qhov txheej txheem no tshwm sim sai sai rau hauv cov kab mob me, thiab nrog lub hnub nyoog, tag nrho cov txheej txheem qeeb.

Thickness

Peb xam txog seb cov hlwb npog cov tawv nqaij, tab sis ho tsis hais dab tsi txog lub thickness ntawm txheej uas peb tau xaiv. Nws tsis yog txhua yam nyob rau txhua qhov. Muaj cov chaw nyob qhov twg lub thickness ncav ob millimeters, thiab nyob rau hauv ib co chaw ntawm peb lub cev nws yog sib npaug rau xya pua pua ntawm ib millimeter. Qhov thinnest feem ntawm qhov epidermis yog sib npaug rau cov thickness ntawm polyethylene zaj duab xis.

Piv txwv, sib piv cov tawv nqaij ntawm luj taws, caj npab thiab muag tawv muag. Pom zoo, txhua qhov chaw lub thickness yog txawv. Tsis tas li ntawd, nyob rau saum pob taws nws lub qhov taub yog ntau tshaj tawm, thiab daim tawv muag ntawm daim tawv muag yog ib txwm txaj muag thiab kev sib tw. Cov plab hnyuv siab plab tseem muaj ib txheej txheej heev ntawm cov tshuaj tua kab mob (li ntawm 0.1 millimeters).

Hloov tshiab

Peb tau tham txog cov lus nug ntawm cov hlwb uas npog cov tawv nqaij. Lub ntiaj teb nyob ib puag ncig peb yog ib qhov kev kawm zoo, uas cia peb kawm ntau yam tshiab thiab muaj txiaj ntsim rau cov menyuam yaus, kom paub txog cov ciam teb tshiab. Cov ntsiab lus no kuj muaj nyob hauv chav kawm ntawm txoj kev kawm.

Los ntawm daim tawv nqaij ntawm daim tawv nqaij nyob ntawm peb cov tsos, ib hnub ib tug neeg poob txog 10 billion hlwb, dhau lub sij hawm no txoj kev ua rau yav tom ntej. Qhov nruab nrab, ib tug neeg tau muab 20 kilograms ntawm daim tawv nqaij ib xyoos twg. Kev noj qab haus huv thiab yau dua peb cov tawv nqaij, qhov ntau dua kev sib hloov ntawm cov hlwb, cov laus laus tev tawm, cov tshiab tau hloov. Thaum lub cev hlob zuj zus lawm, txoj kev ua rau qeeb qeeb, yog li wrinkles tshwm. Ua ke nrog cov tuag lub hlwb, ntau yam teeb meem tshuaj kuj tawm mus. Nws yog cov tshuaj tua kab mob uas tiv thaiv cov kab mob tsis huv los ntawm kev nkag mus hauv lub cev. Cov kev hloov tshiab siv sijhawm ntev dua 21 hnub txog 3 lub hlis, nws tag nrho nyob ntawm hnub nyoog.

Txheej ntawm cov kab mob

Cov lus nug uas cov hlwb npog cov tawv nqaij, cov qib 4 ntawm lub ntiaj teb nyob ib puag ncig yuav tsum tas. Tom qab tag nrho, txij thaum yau, neeg yuav tsum paub tias daim tawv nqaij yog peb cov ntaub thaiv npog. Yog tias koj tsis saib xyuas nws, ces tag nrho lub cev yuav raug kev txom nyem.

Nws yog ib qho tseem ceeb kom paub tias cov kab mob tseem ceeb muaj xws li ob peb txheej:

• Basal;
• Spiny;
• Granular;
• Ci ntsa iab;
• Horny.

Nrog rau tag nrho cov no, cov pob zeb stratum muaj li ntawm 15 theem. Cov txheej hauv lub hlwb yuav suav tau tias yog tuag, vim hais tias lawv tsis tuaj yeem koom, thiab cov txheej hauv puab muaj lub hauv paus, yog li lawv tseem ua neej nyob. Qhov ciam tshaj plaws uas cais cov neeg tuag thiab nyob lub hlwb yog nyob rau hauv cov kab laug sab.