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1、ComparativevertebratecirculatorysystemJing-HongDingBiologyscienceofInternationalcollege,HunanUniversityofArtsandScienceAbstract:Thevertebratecirculatorysystemisaclosed-pipesystem,Itwasdividedintothecardiovascularsystemandthelymphaticsystem.Thecardiovascularsy
2、stemincludingtheheart,arteries,veinsandcapillaries,theblood;lymphaticsystemincludingthelymphaticcapillary,lymphaticvessels,lymphaticduct,lymphnodesandlymph(theomitted).Thecirculatorysystemisthebodyofmaterialtransportandmaintaininternalenvironmentthattheextrac
3、ellularfluidstabilityanimportantsystem.Thecirculatorysystemisanimportantimmunesystem,andparticipateintheregulationofbodytemperature.Keywords:VertebrateThecirculatorysystemThecirculationofthebloodPortalvein1.HeartandbloodcirculationThevertebratebloodinpipeflow
4、scontinuouslyaccordingtoacertaindirection,namelyinthebackofthebodyfromthefronttotheback,whileintheabdomenisfrombacktofront.Butinanyanimalisamostinferioranimal(urochordates)fromthebloodcirculationinthebelongstotheopentube,andtheblooddoesnotflowalongthefixeddir
5、ection,theregularchangeofdirection,thesamevesseltotaketurnstobethearteryandvein,whichisuniqueinthenotochordinanimal.Theheartisadynamicorganbloodcirculation,withamuscularwallthick,withacavity,producerhythmiccontraction,sothatthebloodcirculationflowinbloodvesse
6、ls.1.1BloodcirculationrouteCardiacstructureandchangesfromaquatictoterrestrialvertebratetransitionandevolutionduetorespiratoryorgansarecloselyrelatedtogillbreathingvertebrates(cyclostomesandfishes)withintheheartofallistheblood,theheartwillhypoxicbloodpressuret
7、othegills,aftergasexchange,moreoxygenatedbloodflowsthroughthevariouspartsofthebodydirectlyfromthegillsagain,bloodbacktotheheartofChineseLnightspercyclebody1weeksafteronly1timesintheheart,thebloodcirculationisacircle,calledthesinglecycle.Inawaterlandingprocess
8、,respiratoryorgansfromthegillstothelung,thecirculatorysystemiscorrespondinglychangedsignificantly.Bloodbacktotheheartofthebodyshouldbepressurepulmonarygasexchange,becomemoreoxygenatedbloo
