Epithelial cov ntaub so ntswg: ntawm ciam teb khwb

Thaum tib neeg tham txog qhov no zoo ntawm cov ntaub, kuv nco txog tshwj xeeb tshaj yog ntawm daim tawv nqaij, txawm hais tias tus epithelial cov ntaub so ntswg - nws yog, nyob rau hauv tus, ib yam ntawm cov "ciam teb khwb". Nws cais los ntawm txhua lwm yam kabmob, nws yog muaj nyob rau hauv nyob tus yeees ntawm cov qog ua kua. Ua kev epithelial ntaub so ntswg, qauv thiab muaj nuj nqi ntawm uas sib thooj, nyob rau hauv ib tug tshwj xeeb txoj kev rau txhua hom ntaub. Hais txog dab tsi hom ntawm kev hais lus? Nyeem ntxiv.

Ib tug yam ntxwv ntau feature ntawm tag nrho cov hom - hlwb uas yog nyob rau hauv nyob sib ze nrog txhua lwm yam, feem ntau nyob rau hauv khaubncaws sab nraud povtseg, vim lub barrier muaj nuj nqi ntawm epithelial cov ntaub so ntswg. Tsis tas li ntawd, tag nrho cov hom ntawm epithelial cov ntaub so ntswg nyob rau hauv ntau yog hais tias ntawm lub nyob ib sab lug, lawv yeej ib txwm sib cais los ntawm connective cov ntaub so ntswg - qhov no tsim yog hu ua lub qab daus membrane.

Nyob rau hauv kev epithelium yog yooj yim (ib txheej) thiab cov laminate (ob peb). Raws li, cov qauv ntawm cov epithelial cov ntaub so ntswg tej zaum yuav sib txawv heev.

Tej yam yooj yim epithelium yuav me ntsis flattened rau hauv cov duab. Qhov no hom yog hu ua ib tug squamous. Nws cov kab lub ntsws, cov hlab ntsha, lub plawv muaj kab noj hniav. Tsis tas li ntawd, cov hlwb yog nyob rau hauv lub qaum khaubncaws sab nraud povtseg ntawm daim tawv nqaij thiab lub qhov ncauj mucosa.

Nws tsis yog nyuaj rau twv tus duab ntawm nyhav epithelial hlwb. Cov hlwb yog pom nyob rau hauv lub qog, ducts, qog thiab lub raum tubules. Nyob rau hauv tas li ntawd, lawv tshwm sim tawm lub germinal epithelium nyob rau hauv lub zes qe menyuam ntawm cov poj niam thiab cov txiv neej lub noob qes.

Prismatic epithelium yog yooj yim thiab fawm kib. Lub hlwb muaj tus duab ntawm elongated tuav. Nuclei nyob rau hauv cov hlwb yog "thaum" hauv qab daus daim nyias nyias los ze zog mus thiab tam sim ntawd los ntawm qhov chaw. Zoo, nyob rau hauv lub plab, nws lub ntsej muag lawv kab, nws yog heev npaum - ntau txhoj puab heev muaj Wednesday. Ib txhia ntawm cov hlwb yog ib feem ntawm lub piav thoob hlo kabmob - tsis hnov tsw, saj thiab lub rooj sib hais.

Ciliated columnar epithelium muaj ib tug qhia tshwj xeeb uas zoo li tus growths uas ceev ceev undulating tau txhawb ib yam dab tsi uas yog nyob ze rau lawv. Lawv "nyob" nyob rau hauv lub qhov ntswg thiab ... nyob rau hauv txoj hlab qe menyuam nyob rau hauv cov poj niam, uas lawv los txhawb lub qe mus rau lub tsev me nyuam.

Glandular epithelium hu ua prismatic muaj secreting hlwb. Tej zaum secreting hlwb ntau tshaj columnar. Qhov twg yog lub hlwb uas muaj peev xwm tsim ib tug tsis pub leejtwg paub? Nws yog lub hlwb ntawm epithelial cov ntaub so ntswg, yav tas los txoj kev ntawm specialization. Thiab "kws txawj" lawv yuav sib txawv heev. Koom nyob rau hauv zus tau tej cov enzymes, cov tshuaj hormones, mis nyuj, hnoos qeev, tawm hws, ciab thiab cov qaub ncaug. Ntawm cov hoob kawm, tag nrho cov ntawm cov tshuaj tsis muaj peev xwm yuav tsim muaj ib zaug xwb-celled qog, qog ntawm cov ntaub ntawv, uas muaj ntau epithelial hlwb. Ib tug tib cell hu ua Goblet hlwb. Thaum chiv thawj lawv twb hu ua enterocytes, vim hais tias feem ntau ntawm cov hlwb nyob rau hauv cov hnyuv. Tab sis, ces nws muab tawm hais tias lawv yog tam sim no nyob rau hauv lub conjunctiva ntawm lub qhov muag thiab nyob rau hauv lub pa system, thiab nyob rau hauv lub ducts ntawm lub qog.

Qhov twg cov poj dab ntawm kev sib txhuam thiab txoj kev pheej hmoo ntawm kev raug mob, lub cev ua complex epithelium - tib yam ib tug uas yeej ib txwm muaj ob peb khaubncaws sab nraud povtseg. Peb yuav tau tham txog ntawm daim tawv nqaij thiab lub qhov ncauj mucosa. Nyob rau hauv daim tawv nqaij pov tseg hlwb nyob rau hauv uas multi-keratin protein nyob rau hauv lub qhov ncauj keratin hlwb yog me me, yog li ntawd qhov kov cov tawv nqaij thiab txheej membrane ntawm lub qhov ncauj yog ho sib txawv.

Epithelial cov ntaub so ntswg muaj nuj nqi yog heev txawv. Daim ntawv hauv qab no yog tsis tau kiag li tag nrho.

Cov kev tiv thaiv nuj nqi. Epithelium tiv thaiv txhua yam kev puas tsuaj, tshuaj kub nyhiab, npe nrov ib barrier tiv thaiv kab mob thiab tiv thaiv lub hlwb los ntawm qhov pib dej tsis tau.

Muaj nuj nqi ncus: tshwj xeeb hlwb ntawm epithelial cov ntaub so ntswg daim ntawv kabmob ncus.

Secretory kev ua: yog piav nyob rau hauv kom meej nyob rau hauv lub seem ntawm lub glandular epithelium.

Absorptive: nyob rau hauv cov hnyuv ntawm lub epithelium ntawm lub haum cov as-ham yog nqa tawm.

Feem: hws qog paim pliaj yam nyob rau hauv lub raum epithelium kuj muaj peev xwm koom nyob rau hauv lub filtration, thiab kuj nyob rau hauv reabsorption.

Diffusion: los ntawm ib tug nyias epithelium nyob rau hauv lub ua pa ib ntsuj av tau mus rau hauv lub cev thiab los ntawm cov kev ris gases.

Cleansing muaj nuj nqi: caj pas epithelium cleans huab cua los ntawm hmoov av.

Txo kev sib txhuam: vascular epithelium thiaj li sib haum xeeb ntawm cov hlab phab ntsa thiab cov ntshav hlwb.

Raws li koj tau pom, ib tug ntau ntawm kev khiav dej num, vim hais tias muaj ntau yam hom. Yog xav paub ntxiv txog qhov no koj yuav nyeem tau nyob rau hauv lub zoo phau ntawv ntawm histology.