感觉器官解剖生理.ppt

《感觉器官解剖生理.ppt》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、PartVThesensoryorgansChapteroneThevisualorganconsistsofeyeballandaccessoryorgansofeye.SectiononetheEyeball一、ThestructureofeyeballTheeyeballcomprisesthewalloftheeyeballandthecontentsenclosedbyit．(一)TheWallofEyeballItconsistsofthreetunics(layers)，fromoutsideinwards，whicharethefib

2、roustunic，thevasculartunicandretina．1Thefibroustunic(outersupportinglayer)consistsofthesclerabehindandthecorneainfront.1)Thescleraa.features:posteriorfive-sixthsoftheouterlayer.strong,whiteandopaqueb.scleralvenoussinus(Schlemm’canal)2)Thecorneaa.features:anteriorone-sixthoftheo

3、uterlayer.transparentandnon-vascular,butrichnerveterminals2.Thevasculartunicconsistsoftheiris,theciliarybodyandthechoroid1)Theirisa.locationandshapeb.pupilc.sphincteranddilatorpupillaed.iridocornealanglee.colour:brown,dark,blue.dependsuponthenumberandplacementofpigmentcells(mel

4、anocytes)2)Theciliarybodya.locationandshapeb.ciliaryringandciliaryprocessesc.ciliarymuscled.ciliaryzonule(suspensoryligament)e.function:produceaqueoushumor3)Thechoroida.locationandshape:posteriortwothirdsofchoroidb.features:numerousbloodvesselsandpigmentcells3.Theinnertunic(the

5、retina)1)Division:theopticpart,ciliarypartandiridialpart2)Construction:twolayers→outerpigmentedlayerandinnerneuroretina(photoreceptors:rodandconecells)3)Opticdisc(blindspot)4)Maculalutea:foveacentralis→visionissharpest（二）Thecontentsoftheeyeballincludetheaqueoushumor,thevitreous

6、bodyandthelens.Withthecorneaaltogethertoformtherefractivemedia.l.Thechambersoftheeye:betweenthecorneaandthelens;anddividedintotheanteriorandtheposteriorchambersbytheiris.Itisfilledwithaqueoushumor.2.Theaqueoushumor:producedbythecapillariesoftheciliaryprocesses.Itiscolourless,tr

7、ansparentandwateryfluid.3.Thelens1)Location:liesbetweentheirisandthevitreousbody.2)Features:transparentandelastic,biconvexbodylackingvesselsandnerves3）Structures:outercortexandinnernucleus4.Thevitreousbodycolourless,transparentandjelly-likesubstance.Itfillsthespacebetweenthelen

8、sandtheretina(thevitreouschamber)Sectiontwotheaccessor