Epithelial Tissue 上皮组织 Jun zhou(周俊) School of Medicine, Zhejiang University 20140408
1 Epithelial Tissue 上皮组织 Jun Zhou (周俊) School of Medicine, Zhejiang University 20140408
General feature 1)More cells and less extracellular ground substance 2) Polarisation: free outer surface: face air or other things basal surface: face underlying CT, have basement membrane 3)Avascularity, but innervation --no blood vessels rich in nerve terminals 4)Functions protection, secretion, Absorption, excretion and sensory reception ⑧⑧昏
2 General feature 1) More cells and less extracellular ground substance 2) Polarisaton: ---free outer surface: face air or other things ---basal surface: face underlying CT, have basement membrane 3) Avascularity, but innervation: ---no blood vessels ---rich in nerve terminals 4) Functions: protection, secretion, Absorption, excretion and sensory reception
Classification ◆ Covering epithelium(被覆上皮): cover body surface or line the inner surface of body cavities tubes and sac ◆ Glandular epithelium(腺上皮): the epithelium which main function is secretion ◆ Sensory epithelium(感觉上皮): the epithelium which has special sensory function
3 Classification ◆ Covering epithelium(被覆上皮): cover body surface or line the inner surface of body cavities, tubes and sac. ◆ Glandular epithelium(腺上皮): the epithelium which main function is secretion. ◆ Sensory epithelium(感觉上皮): the epithelium which has special sensory function
Covering epithelium According to the number of layer and shape of cells Simple epi.: ---simple squamous epi - -simple cuboidal epi -simple columnar epi. -pseudostratified ciliated columnar epi Stratified epi.: ---stratified squamous epI -e-stratified columnar epi ---transitional epi
4 Covering epithelium: According to the number of layer and shape of cells Simple epi.: ---simple squamous epi. ---simple cuboidal epi. ---simple columnar epi. ---pseudostratified ciliated columnar epi. Stratified epi.: ---stratified squamous epi. ---stratified columnar epi. ---transitional epi
simple squamous epi.(单层扁平上皮) 的 one layer flattened cells, cell border are interdigitate flattened ellipsoid nucleus
5 simple squamous epi.(单层扁平上皮) ◆ one layer flattened cells, cell border are interdigitate ◆ flattened ellipsoid nucleus