Qhov Tseem Ceeb Qhov txawv - Epithelial vs Mesenchymal Cells
Epithelial thiab mesenchymal hlwb sawv cev rau ob ntawm cov xovtooj sib txawv tseem ceeb hauv cov vertebrates. Epithelial cells yog cov kab mob sib xws uas txuas nrog nruj kom tsim cov epithelium ntawm lub cev. Epithelium yog cov ntaub so ntswg uas cais cov ntaub so ntswg hauv lub cev ntawm lub cev sab nraud. Epithelial cell npog tag nrho lub cev. Lawv hloov mus rau hauv mesenchymal hlwb los ntawm kev muaj peev xwm tsiv teb tsaws chaw thiab poob lawv cov polarity thiab cell mus rau cell adhesion. Mesenchymal hlwb yog cov hlwb uas muaj peev xwm muab tau los ntawm cov mesoderm, uas tsim ntau hom cell loj hauv lub cev. Qhov sib txawv tseem ceeb ntawm cov hlwb epithelial thiab mesenchymal yog cov hlwb epithelial sib txawv los npog lub cev, kab kab noj hniav, thiab cov kab mob hauv nruab nrog cev thaum mesenchymal hlwb sib txawv rau ntau hom cell loj xws li cov ntaub so ntswg, pob txha mos, cov ntaub so ntswg adipose, cov ntaub so ntswg lymphatic., pob txha nqaij, thiab lwm yam.
Dab tsi yog Epithelial Cells?
Epithelial cells yog cov hlwb sib xws, uas ua rau cov kab mob epithelium. Cov hlwb no nyob ruaj ruaj, nruj nreem ntim thiab khi rau hauv qab daus membrane. Cov ntaub so ntswg epithelial npog lub cev (sab nraud ntawm lub cev), kab hollow kab mob xws li digestive, ua pa thiab urogenital system. Cov ntaub so ntswg no tseem ua rau lub cev kab noj hniav thiab tsim cov qog. Epithelial hlwb yog avascular. Lawv tsis muaj cov hlab ntsha. Lawv muaj peev xwm rov tsim dua los ntawm kev faib cell los hloov cov hlwb tuag.
Epithelium tuaj yeem faib raws li cov txheej txheem lossis cov duab ntawm tes. Raws li tus naj npawb ntawm cov khaubncaws sab nraud povtseg, muaj peb hom epithelium npe, yooj yim, stratified thiab pseudostratified. Cov kab mob epithelial txuas ntxiv los ntawm cov ntaub so ntswg hauv qab daus thiab npaj rau hauv ib txheej hauv cov epithelium yooj yim. Yog hais tias ntau tshaj ib txheej ntawm cov epithelial hlwb yog teem nyob rau hauv lub epithelium, ces nws yog hu ua stratified epithelium. Pseudostratified epithelium zoo li ob peb txheej cell. Txawm li cas los xij, txhua lub hlwb hauv pseudostratified epithelium txuas nrog rau hauv qab daus daim nyias nyias.
Muaj cov duab sib txawv ntawm cov hlwb hu ua squamous, cuboidal thiab columnar. Squamous epithelial hlwb yog tiaj tus thaum lub hlwb cuboidal sib npaug ntawm qhov dav thiab qhov siab. Cov kab ke kab ke siab dua.
Epithelial cells ua tiav ntau lub luag haujlwm hauv lub cev. Lawv muab kev tiv thaiv rau cov hlwb hauv qab, ua qhov cuam tshuam rau cov kab mob pathogenic microorganisms thiab lwm yam kev phom sij, tso tawm thiab nqus cov tshuaj thiab tso cai nkag mus rau cov tshuaj.
Epithelial hlwb dhau los ua cov hlwb mesenchymal thaum lub sijhawm tsim cov ntaub so ntswg hauv lub embryo los ntawm cov txheej txheem hu ua epithelial-mesenchymal hloov. Qhov kev hloov pauv hloov pauv tshwm sim thaum cov hlwb thib ob ntawm cov epithelial synthesized.
Daim duab 01: Cov ntaub so ntswg epithelial
Mesenchymal Cells yog dab tsi?
Mesenchymal hlwb yog ib pawg ntawm cov hlwb uas muaj cov qauv zoo sib xws thiab kev ua haujlwm. Cov hlwb no ua rau cov ntaub so ntswg mesenchymal. Nws yog cov ntaub so ntswg los ntawm tag nrho peb txheej kab mob hauv gastrula. Mesenchymal qia hlwb tuaj yeem sib txawv rau ntau hom cell loj. Yog li ntawd, cov cell yog suav hais tias yog multipotent qia hlwb. Cov hlwb no hloov mus rau hauv cov hlwb, uas xav tau los ua cov ntaub so ntswg sib txuas, pob txha mos, cov ntaub so ntswg adipose, cov ntaub so ntswg lymphatic thiab cov pob txha hauv cov neeg laus. Mesenchymal qia hlwb yog fusiform lossis stellate hlwb thiab nyob nruab nrab ntawm ectoderm thiab endoderm ntawm cov tub ntxhais hluas embryo nyob rau thaj tsam ntawm mesoderm. Feem ntau mesenchymal hlwb pib los ntawm mesoderm.
Mesenchyme thawj zaug tshwm sim thaum lub plab zom mov vim qhov kev hloov pauv hu ua epithelial - mesenchymal hloov pauv. Nws yog ib qho ntawm cov txheej txheem yooj yim uas tshwm sim thaum lub sij hawm cov ntaub so ntswg regeneration ntawm lub embryo. Embryonic epithelial hlwb ua mesenchymal hlwb. Mesenchymal hlwb kuj tuaj yeem ua cov hlwb epithelial. Txoj kev hloov pauv no yog thim rov qab. Kev hloov pauv ntawm cov hlwb epithelial mus rau hauv mesenchymal hlwb pib los ntawm kev poob ntawm epithelial cadherin, nruj junctions, thiab adherens junctions ntawm lub cell membranes ntawm epithelial hlwb. Cov molecules saum npoo ntawm cov hlwb epithelial tau dhau los ua endocytosis, thiab cov duab ntawm microtubule cytoskeleton yog xoob, ua rau cov hlwb mesenchymal mus rau hauv cov extracellular matrix. Thaum cov ntaub so ntswg theem nrab yuav tsum tau tsim, mesenchymal hlwb hloov mus rau hauv cov hlwb epithelial, qhia cov txheej txheem rov qab.
Daim duab 02: Mesenchyme
Dab tsi yog qhov txawv ntawm Epithelial thiab Mesenchymal Cells?
Epithelial vs Mesenchymal Cells |
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| Epithelial cells yog cov hlwb sib xws, uas ua rau epithelium ntawm lub cev nqaij daim tawv. | Mesenchymal hlwb yog cov hlwb ntau lub zog muab los ntawm mesoderm. |
| sib txawv | |
| Lawv sib txawv los npog lub cev qhov chaw, kab hollow lub cev thiab lub cev kev coj noj coj ua. | Mesenchymal hlwb tuaj yeem sib txawv rau hauv cov hlwb, uas ua rau cov ntaub so ntswg sib txuas, pob txha mos, cov ntaub so ntswg adipose, cov ntaub so ntswg lymphatic, thiab cov pob txha. |
| Epithelial cells tuaj yeem dhau los ua cov hlwb mesenchymal. | Mesenchymal hlwb tuaj yeem ua cov hlwb epithelial. |
Summary – Epithelial vs Mesenchymal Cells
Epithelial hlwb thiab mesenchymal hlwb yog ob hom hlwb sib txawv pom nyob rau hauv vertebrates. Cov kab mob epithelial nruj nruj nrog ib leeg thiab tsim cov ntaub so ntswg hu ua epithelium. Nws yog txheej txheej tiv thaiv, uas npog tag nrho lub cev qhov chaw thiab lub cev kab noj hniav. Mesenchymal hlwb yog cov hlwb uas muaj peev xwm muab tau los ntawm mesoderm. Mesenchymal qia hlwb muaj peev xwm sib txawv rau ntau hom hlwb. Yog li ntawd, lawv hloov mus rau hauv cov hlwb uas xav tau los ua cov ntaub so ntswg, pob txha mos, cov ntaub so ntswg adipose, cov ntaub so ntswg lymphatic thiab cov pob txha hauv cov neeg laus. Qhov no yog qhov txawv ntawm epithelial thiab mesenchymal hlwb.
Download PDF Version of Epithelial vs Mesenchymal Cells
Koj tuaj yeem rub tawm PDF version ntawm kab lus no thiab siv nws rau offline hom phiaj raws li cov ntawv sau tseg. Thov download PDF version ntawm no Qhov txawv Ntawm Epithelial thiab Mesenchymal Cells.
