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1、Chapter7BloodCirculation（血液循环）Section1SummaryBloodcirculation(血液循环):Def:Bloodcontinuouslycirculatoryflowsincardiovascularsystem(是指血液在心血管系统内周而复始地循环流动)Heart(心脏):Muscle-pump,dynamicorgan. (肌肉泵,动力器官)Artery(动脉):Thevesselwhichcanguidebloodtoleaveheartandflowintotissues.(
2、引导血液离开心脏流向各组织器官的管道).exchange.(进行物质交换的场所)Vein(静脉):Thevesselwhichcanguidebloodtoreturnheart.(引导血液回心的管道)Capillary(毛细血管):TheplaceofsubstanceSection2TheStructuresandFunctionsof Myocardium(心肌的结构与机能特性)1.Autorhythmicity(自动节律性)Def:Theabilityofanexcitablecelltorhythmicallyin
3、itiateitsownactionpotentials(组织细胞能自动发生节律性兴奋的特性)衡量指标:Thefrequencyofautomaticexcitation(自动兴奋的频率)2.FunctionalSynplasm（机能合胞体）Structurebasis:Intercalateddisc(闰盘)心肌的机能合体性Thephenomenonof‘allornone’inthemyocardial（心肌收缩的“全或无”现象）3.SpecificConductionSystem(特殊传导系统)Thetypesofmy
4、ocardiumcell(心肌细胞的类型):(1)Normalmyocardium(普通的心肌细胞):工作细胞(非自律细胞),包括心房肌、心室肌,具兴奋性,传导性,收缩性,无自律性workingcardiaccell(non-autorhythmiccell)：includeatrialmuscleandventricularmuscle,haveexcitability,conductivity,andcontractibility,non-autorhythmicity.(2)Specificmyocardium(特殊分
5、化的心肌细胞):自律细胞和非自律细胞,包括P细胞、浦肯野氏细胞与结区细胞,自律细胞有兴奋性,自律性和传导性,基本无收缩性,具有产生和传导节律性兴奋的能力Rhythmiccellandnon-autorhythmiccell,includePcellandPurkinjecell,haveexcitability,autorhythmicityandconductivity,nocontractibility,alsohavecapacitytoproduceandconductrhythmicexcitationSino-a
6、rtrialnode(S-Anode,窦房结)Artrio-ventricularnode(A-Vnode,房室结)atrioventricularbundle0.05m/sandbilateralbundles(房室束及左右束支)2-5m/sPurkinjefiber(浦肯野氏纤维)2-5m/sFig.7-14atrioventriculardelay(房室延搁)anditssignificance:Pacemaker(正常起搏点)：S-Anode,rightatriumintinewall(窦房结,右心房内壁)Laten
7、tpacemaker(潜在起搏点):Akindofautorhythmictissuewhichdon’texpressautorhythmicityinnormalcircumstances.(正常情况下不表现本身自律性的自律组织)Ectopicpacemaker(异位起搏点):Thelatentpacemakerwhichcancontrol cardiacexcitationandpalmusinabnormal circumstances. (异常情况下控制心脏兴奋和跳动的潜在起搏点)Artificialpacema
8、ker(人工起博器)4.TheAPofmyocardialcell------bioeletricityphenomenonofmyocardialcell (心肌细胞的AP---心肌细胞的生物电现象)(1)Differentfromtheskeletalmuscle. (不同于骨骼肌)(
