Mesenteric ArteriesMesenteric Artery, SuperiorAortaMesenteric Artery, InferiorVasodilationArteriesBiological FactorsMuscle, Smooth, VascularVasoconstrictionAorta, ThoracicVasoconstrictor AgentsVasodilator AgentsRats, WistarEndothelium, VascularMyographyPhenylephrineMuscle RelaxationNorepinephrineAcetylcholineFlunarizineRats, Sprague-DawleySplanchnic CirculationEndothelium-Dependent Relaxing FactorsMesenteric Vascular OcclusionAorta, AbdominalCeliac ArterySuperior Mesenteric Artery SyndromeApaminNitric OxidePulmonary ArteryMuscle ContractionDose-Response Relationship, DrugCalcitonin Gene-Related Peptide15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidRenal ArteryPotassium Channels, Calcium-ActivatedPotassium Channel BlockersPyrogallolCharybdotoxinRats, Inbred WKYMethylene BlueCarotid ArteriesCerebral ArteriesFemoral ArteryMuscle TonusMethoxamineNG-Nitroarginine Methyl EsterVasomotor SystemPotassium ChlorideBasilar ArteryNifedipineThromboxane A2Membrane PotentialsVascular ResistanceNitroprussideEnzyme InhibitorsNitric Oxide SynthaseIndomethacinCalciumIliac ArteryBlood PressureElectric StimulationCromakalimMesenteric VeinsSympathetic Nervous SystemSplenic ArteryMyocytes, Smooth MuscleCyclic GMPPotassiumGlyburideCoronary Artery BypassPyrazolesVertebral ArteryThromboxane-A SynthaseCalcium Channel BlockersHepatic ArteryTime FactorsIsometric ContractionRadial ArteryMammary ArteriesSubclavian ArteryPotassium ChannelsObesityIndolesCarotid Artery, InternalCoronary VesselsArginineTomography, X-Ray ComputedAngiographyDuodenostomyCarotid Artery DiseasesBrachial ArteryElectrophysiologyRats, Inbred SHRAdenosine TriphosphateCarotid Artery, CommonRabbitsReceptors, DrugAneurysmRegional Blood Flow