Epithelia yog polarized txheej ntawm adherent hlwb uas yog lub tsev blocks rau lub cev thiab appendage lug thoob plaws tsiaj. Txhawm rau khaws cov ntaub so ntswg thiab thaiv kev ua haujlwm thaum lub sijhawm homeostasis thiab kev loj hlob sai, tus neeg cov hlwb epithelial faib ua ntau yam txwv.
Ntau npaum li cas cov hlwb epithelial faib?
Lub epithelium ntawm tib neeg txoj hnyuv hloov tsawg kawg ib zaug hauv ib lub lis piam thoob plaws lub neej. Raws li cov cell tuag ntawm qhov chaw, lawv tau hloov los ntawm cov cell tshiab. Thaum muaj hnub nyoog 60 xyoo, ib tug neeg tau dhau los ntawm tsawg kawg 3,000 lub voj voog hloov, uas txhais tau hais tias qee cov kab mob ntawm tes yuav tsum dhau los ntawm ntau tiam neeg.
Pob cov hlwb epithelial faib nrawm?
yam ntxwv dav dav. Epithelial hlwb npog txhua qhov chaw ntawm lub cev. … Vim li ntawd, cov hlwb no faib sai sai los hloov cov hlwb puascov hlwb uas txuas ntxiv sloughed tawm.
Puas epithelial cell undergo mitosis?
Nyob rau hauv columnar epithelia, hlwb undergo a drastic shape change at mitotic entry as they round up.
Pob cov hlwb epithelial proliferate?
Epithelial cell so yog ntxias kom faib thiab loj hloblos ntawm cov neeg kho mob inflammatory, proinflammatory cytokines, thiab cov yam ntxwv loj hlob tawm los ntawm cov cell thaum lub sij hawm periradicular o. Quiescent epithelial cell so tuaj yeem coj zoo li txwv-muaj peev xwm qia hlwb yog txhawb kom loj hlob.
