(2) Stable (quiescent) cells:DDefinition: These cellss not divide or at avery slow rate and undergo rapiddivision in response to injuryCell groups:Parenchymalcells of glandularorgan:liver, kidneys→ tubuel epithelial.Mesenchymalcells:fibroblast, SMC
(2) Stable (quiescent) cells: ① Definition: These cells not divide or at a very slow rate and undergo rapid division in response to injury. ② Cell groups: Parenchymal cells of glandular organ: liver, kidneys→ tubuel epithelial. Mesenchymal cells: fibroblast, SMC
(3)Permanent(nondividing) cells:11Definition: no capacityof regeneration2)Cellgroups:Nerve cells:Neurons destroyed arepermanentlostreplaced bytheproliferation ofglial CSkeletalmusclecellsCardiacmusclecells
(3) Permanent (nondividing) cells: ① Definition: no capacity of regeneration ② Cell groups: Nerve cells: Neurons destroyed are permanent lost replaced by the proliferation of glial C. Skeletal muscle cells Cardiac muscle cells
二、1ofRegenerationprocessvarioustissues(一)Epithelialtissuel.Surfaceepithelium:① Squamous cell→ basallayer cell→proliferationColumnar cell→ adjacentgland recesscells→proliferation
二、Regeneration process of various tissues (一) Epithelial tissue 1. Surface epithelium: ① Squamous cell→ basal layer cell →proliferation ② Columnar cell → adjacent gland recess cells→proliferation
2.Glandular epithelium:Base membrane intact → restored cellBase membrane destroyed → difficultLiver:1Resected partlyliver cellproliferation2))Necrosisof liverC,reticularframeworkintact:hepatocyte proliferation restore the structure3Necrosis widely,framework collapsedhepatocyte nodular regeneration, FT↑
2. Glandular epithelium: Base membrane intact → restored cell Base membrane destroyed → difficult Liver: ① Resected partly →liver cell proliferation ② Necrosis of liver C, reticular framework intact : hepatocyte proliferation → restore the structure ③ Necrosis widely, framework collapsed →hepatocyte nodular regeneration, FT↑
(二)FibroustissueFibroblast proliferationsynthesis collagenderived fromquiescent fibrocyteundifferentiatedmesenchymalC
(二) Fibrous tissue Fibroblast proliferation synthesis collagen derived from quiescent fibrocyte undifferentiated mesenchymal C