医学英语 心脏.ppt

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1、SUMC2011-2012Student’scopyThecardiovascularsystemWhatisthecirculatorysystem?WhatdoestheCVsystemdo?InternalandexternalanatomyCardiaccycleHeartsoundsConductivesystemoftheheartBloodvesselsDiseasesoftheCVSTheHeartandbloodvesselstogethermakeupthecardiovascularSystem.Circulatebloodthroughoutenti

2、rebodyforTransportofoxygentocellsTransportofCO2awayfromcellsTransportofnutrients(glucose)tocellsMovementofimmunesystemcomponents(cells,antibodies)TransportofendocrineglandsecretionsTheHeart:locationinthoraxTheHeart:locationinthoraxObliquePositionApex=LeftofMidline(5thICS),Anteriortorestofh

3、eartBase(posteriorsurface)sitsonvertebralcolumnSuperiorRight=3rdCostalCartilage,1”rightmidsternumSuperiorLeft=2ndCostalCartilage,1”leftmidsternumInferiorRight=6thCostalCartilage,1”rightmidsternumInferiorLeft=5thIntercostalSpaceatMidclavicularlineSerousmembraneContinuouswithbloodvesselsTheH

4、eart:musclelayersandcoveringsConnectivetissEndothiliumExternalHeartAnatomyPage44TheHeart:ChambersLungsBodycellsOurcirculatorysystemisadoublecirculatorysystem.Thismeansithastwopartsparts.therightsideofthesystemdealswithdeoxygenatedblood.theleftsideofthesystemdealswithoxygenatedblood.Circula

5、tionCoronarycirculation–thecirculationofbloodwithintheheart.Pulmonarycirculation–theflowofbloodbetweentheheartandlungs.Systemiccirculation–theflowofbloodbetweentheheartandthecellsofthebody.TheHeart:ValvesBicuspid(mitral)Tricuspid(AV)PulmonaryAortic(SL)HowdoestheHeartwork?bloodfromthebodybl

6、oodfromthelungsTheheartbeatbeginswhentheheartmusclesrelaxandbloodflowsintotheatria.STEPONETheatriathencontractandthevalvesopentoallowbloodintotheventricles.HowdoestheHeartwork?STEPTWOHowdoestheHeartwork?Thevalvesclosetostopbloodflowingbackwards.Theventriclescontractforcingthebloodtoleaveth

7、eheart.Atthesametime,theatriaarerelaxingandonceagainfillingwithblood.Thecyclethenrepeatsitself.STEPTHREEFillingofHeartChambers–theCardiacCycleCopyright©2003PearsonEducation,Inc.publishingasBenjaminCummingsTheHeart:CardiacOutputCopyright©2003PearsonEducation,I