Cov tib neeg lub cev, zoo li tag nrho cov nyob yam, yog cov los ntawm tus yam ntxwv thiab tej units - hlwb. Lawv, nyob rau hauv lem, nyob rau general thaj av (hauv paus chiv keeb, morphology, muaj nuj nqi) nyob ua ke hauv cov ntaub so ntswg uas yuav ua tau thiab tag nrho peb cov kabmob, cov hlab ntsha, cov ntshav thiab cov qog. Ib tug tshwj xeeb yog ib feem ntawm lawv cov epithelium, raws li nws prevails nyob rau hauv lub cev thiab ua ib tug txheej thiab secretory zog. Yog li, raws li nyob rau hauv nws cov built daim tawv nqaij thiab lub serous membrane, nws cov ntaub ntawv ib tug qauv ntawm cov puab thiab txheej caj pas secretion. Thiab tseem ceeb tshaj, tag nrho cov kab cov hauv nruab nrog cev thiab cov hlab ntsha (squamous epithelium). Hais tias yog, tus ciam teb yog, rau nkawv noj, nruab nrab ntawm tus kab mob thiab qhov ib puag ncig. Nws ua qhov no ntaub ntawm epithelial hlwb, uas muaj nrees kev cob cog rua rau txhua lwm yam los ntawm ib tug ntau yam ntawm txoj kev ntawm intercellular hu: koj cov menyuam sib nplaum thiab kaw, raws li zoo raws li tshwj xeeb ntiv tes zoo li protrusions ntawm daim nyias nyias - interdigitatsy. Lawv tuas nrog t. N. cementing tshuaj uas muaj ib tug loj npaum li cas ntawm hyaluronic acid. Yog li, tsim khoom khaubncaws sab nraud povtseg, uas feem ntau yog txuas mus rau lub qab daus membrane, thiab lawv noj cov zaub mov muaj ntau lwm xoob connective cov ntaub so ntswg nrog cov hlab ntsha thiab qab haus huv. Tag nrho ions thiab lub zog substrates kuaj nyob rau hauv epithelial hlwb los ntawm diffusion los ntawm ib tug nyias-walled cov hlab ntsha.
Classification thiab muaj nuj nqi
Raws li cov morphology thiab cov yam ntxwv nta kom paub qhov txawv epithelium yog tiaj tus, nyhav, cylindrical, multilayered, ciliary (ciliary) thiab caj pas.
Nyob rau hauv lem, tag nrho cov subtypes, tsuas yog cov xeem pab pawg neeg tsim ib qho txheej hom vim hais tias delimit nruab nrab kab mob los ntawm cov metabolism thiab yog nqa ntawm lawv los ntawm suction thiab tawm. Tsis tas li ntawd epithelium, xws li tiaj tus, tiv thaiv tag nrho cov ntawm qhov pib khaubncaws sab nraud povtseg los ntawm ntau yam puas tsuaj :. Neeg kho tshuab, tshuaj, lub cev, thiab lwm yam Nyob rau hauv no kev twb kev txuas, nws muaj lub siab tshaj plaws regenerator muaj peev xwm muab piv rau lwm tus lub cev nqaij. Tshwj xeeb yog tseem ceeb heev rau nws daim tawv nqaij thiab ua pa ib ntsuj av tau, raws li lawv yog ncaj qha nyob rau hauv kev sib cuag nrog cov sab nraud ib puag ncig. Tsis tas li ntawd tiaj epithelium thiab glandular hauv ob sab phlu kabmob ntawm tus mob huam thiab urogenital system, tiv thaiv los ntawm adhesion thiab cov kev taw qhia ntawm pathogenic cov kab mob, raws li tau zoo raws li cov tshuaj lom tuag thiab toxins.
Lub luag hauj lwm nyob rau hauv lub mob
Vim hais tias lub hlwb yog pheej tshiab, ces peeled thiab nqa deb tuag tam sim no absorbed zis los yog cov ntshav macrophages. Nyob rau hauv kev twb kev txuas nrog rau qhov no, tiaj epithelia, tus nqi uas lub urinalysis yog 1-2 nyob rau hauv lub teb ntawm saib ntawm lub tshuab kuaj kab mob, muaj ib tug diagnostic nqi. Thiab yog hais tias nws yog txiav txim nyob rau hauv cov txiv neej yog tsis tshua muaj, nws yog yuav luag ib txwm poj niam. Yog vim li cas yog qhov txawv qauv ntawm cov excretory huam: muaj zog nrog txiv neej pw epithelium ntog tiaj nyob rau hauv cov zis ntawm tsuas yog tus qis feem peb ntawm lub qhov zis, thiab ib tug tsis muaj zog - thiab txawm los ntawm qhov chaw mos. Nyob rau hauv lub xub ntiag ntawm o nyob rau hauv lub mob txeeb zig nqi yuav ua rau kom dramatically, tab sis ib tug ntau dua diagnostic nqi muaj ib tug hloov epithelium, uas yog feem ntau tsis tuaj kawm ntawv nyob rau hauv lub ntsuam.