重蹇暗科大学 gqing Med山eal Univer some examples Continuously dividing (labile)cells Stratified epithelia of skin,oral cavity,vagina, cervix;cuboidal epithelia of exocrine ducts; columnar epithelium of GI tract,uterus; transitional epithelium of bladder;hematopoietic cells Quiescent (stable)cells Parenchymal cells of liver,kidney,pancreas; endothelial cells,smooth muscle,fibroblasts Nondividing (permanent)cells -Nerve cells,cardiac myocytes,skeletal muscle
Continuously dividing (labile) cells – Stratified epithelia of skin, oral cavity, vagina, cervix; cuboidal epithelia of exocrine ducts; columnar epithelium of GI tract, uterus; transitional epithelium of bladder; hematopoietic cells Quiescent (stable) cells – Parenchymal cells of liver, kidney, pancreas; endothelial cells, smooth muscle, fibroblasts Nondividing (permanent) cells – Nerve cells, cardiac myocytes, skeletal muscle some examples :
重麦等科大星 hongging Medical University 1.The regenerative process of several tissues The process of regeneration can be divided into two main Components: Movement of surviving cells into the vacant space made available by loss due to wounding or necrosis. Proliferation of surviving cells to replace the loss
1.The regenerative process of several tissues The process of regeneration can be divided into two main Components: ⚫ Movement of surviving cells into the vacant space made available by loss due to wounding or necrosis. ⚫ Proliferation of surviving cells to replace the loss
国重走等种大学 nongqing Medical University 1)Epithelial tissue Squamous epithelium:The dividing basal cells Mucosal epithelium:Viable epithelium cells Glandular epithelium:Surviving glandular cells All of them are complete regeneration
1）Epithelial tissue Squamous epithelium:The dividing basal cells Mucosal epithelium:Viable epithelium cells Glandular epithelium:Surviving glandular cells All of them are complete regeneration
重麦路科大 ongqing Medical University 2)Fibrous tissue FIBROCYTES (and primitive cells) situated around capillaries and loose connective tissues Enlarge to become active SECRETION OF FIBROBLASTS PROCOLLAGEN Condensation to form RETICULIN fibres· Condensation to form COLLAGEN fibres. Bonding and weaving SCAR TISSUE Reversion to FIBROCYTES
2）Fibrous tissue
重蹇暗科大星 ongqing Med山eal Univers 3)Blood vessel DCapillary and small blood vessel Proliferation of blood vessel endothelial cells into the damaged area- +form solid buds canalise thin- walled capillaries. 2Large blood vessel Endothelial cells can complete regenerate;but the muscle cannot regenerate,it can be replaced by fibrous tissue
3）Blood vessel ①Capillary and small blood vessel : Proliferation of blood vessel endothelial cells into the damaged area form solid buds canalise thinwalled capillaries. ②Large blood vessel :Endothelial cells can complete regenerate; but the muscle cannot regenerate,it can be replaced by fibrous tissue