感觉器官解剖生理

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

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

3、vascular,butrichnerveterminals2.Thevasculartunicconsistsoftheiris,theciliarybodyandthechoroid1)Theirisa.locationandshapeb.pupilc.sphincteranddilatorpupillaed.iridocornealanglee.colour:brown,dark,blue.dependsuponthenumberandplacementofpigmentcells(melanocytes)2)Theciliarybodya.locationandshap

4、eb.ciliaryringandciliaryprocessesc.ciliarymuscled.ciliaryzonule(suspensoryligament)e.function:produceaqueoushumor3)Thechoroida.locationandshape:posteriortwothirdsofchoroidb.features:numerousbloodvesselsandpigmentcells3.Theinnertunic(theretina)1)Division:theopticpart,ciliarypartandiridialpart

5、2)Construction:twolayers→outerpigmentedlayerandinnerneuroretina(photoreceptors:rodandconecells)3)Opticdisc(blindspot)4)Maculalutea:foveacentralis→visionissharpest（二）Thecontentsoftheeyeballincludetheaqueoushumor,thevitreousbodyandthelens.Withthecorneaaltogethertoformtherefractivemedia.l.Thech

6、ambersoftheeye:betweenthecorneaandthelens;anddividedintotheanteriorandtheposteriorchambersbytheiris.Itisfilledwithaqueoushumor.2.Theaqueoushumor:producedbythecapillariesoftheciliaryprocesses.Itiscolourless,transparentandwateryfluid.3.Thelens1)Location:liesbetweentheirisandthevitreousbody.2)F

7、eatures:transparentandelastic,biconvexbodylackingvesselsandnerves3）Structures:outercortexandinnernucleus4.Thevitreousbodycolourless,transparentandjelly-likesubstance.Itfillsthespacebetweenthelensandtheretina(thevitreouschamber)Sectiontwotheaccessor