教程成果皮肤

第12:TheKeypointsoftheStructureandfunctionoftheStructureofHistologicalstructureoftheHistologicalstructureofStructureandfunctionoftheskin23 )4❖The❖Theconsistof5(epidermis)(0.07～厚的部位(0.8～1.5mm)。 6 7 白丝(keratinfilament)，也称张力丝(tonofilament)。8细胞spinoucell；胞9(tonofibril)和外皮蛋白（增厚胞膜）；胞质 4(stratum5．角质层(stratum 胞(hornycell)，HE染色，细胞呈均质状，轮廓不清；胞质 黑素细胞(melanocyte)；合成黑素的细胞细胞(Langerhanscell为APC细胞(Merkelcell)1.EM：胞质内丰富RER,Golgi体，较多椭圆形小体LM：圆

Langerhans 颗粒(Birbeckgranule)；呈盘状或 约1～2mm。层(papillary (dermal皮纹（dermatoglyph)，俗称，在法医和人类学触觉小体：随增加而减少，卵圆形，长轴，细胞扁平 皮脂腺（sebaceousgland）汗腺（sweatgland） 毛囊hairfollicle：由 毛球hairbulb：由 胞器；近（短小）导管处腺细胞排出，同脂滴一起排出，称为皮脂sebum。sebaceous 3.汗腺sweat分泌部：蟠团位于真皮和皮下sweat和等部位，分泌Theskincoversthesurfaceofthebodyandservesmanyfunctions.Itiscomposedoftheepidermis,anepitheliallayerofectodermalorigin,andthedermis,alayerofconnectivetissueofmesodermalorigin.Theepidermisconsistsmainlyofastratifiedsquamouskeratinizedepithelium,whicharecalledkeratinocytes.Theepidermisalsocontains3nonkeratinocytes,includingmelanocytes,Langerhanscells,andMerkelcells.Fromdermisoutward,theepidermisconsistsof5layersofkeratin-productingcells(keratinocytes)asfollows:(1)stratumbasale(stratumgerminativum),borderingonthebasallamina;(2)stratumspinosumofkeratinocytes/prickleepithelialcells;(3)stratumgranulosumofcellswithbasophilic(4)stratumlucidum,athinpalelayerofkeratinseenwhenthestratumcorisverythick;(5)stratumcor keratinizedcells(outermost).Thedermisistheconnectivetissuethatsupporttheepidermisandbindsittothesubcutaneoustissue(hypodermis).Thesurfaceofthedermisisveryirregularandhasmanyprojections(dermalpapillae)thatinterdigiatewithprojectionsoftheepidermis.Dermalpapillaearemorenumerousinskinthatissubjectedtofrequentpressure;theyincreaseandreinthedermal-epidermaljunction.Thedermiscontains2layerswithratherindistinctboundaries—theoutrmostpapillarylayerandthedeeperreticularlayer.Thepapillarylayeriscomposedoflooseconnectivetissue;fibroblastsandotherconnectivecells,suchasmastcellsandmacrophages,arepresent.Thepapillarylayerissocalledbecauseitconstitutesthemajorpartofthedermalpapillae.Therecticularlayeristhicker,composedofirregulardenseconnectivetissue,thereforehasmorefi