ArteriolesBlood VesselsPia MaterVasodilationRetinal VesselsVenulesRetinal ArteryMicrocirculationLymphatic VesselsVasoconstrictionCoronary VesselsEndothelium, VascularMuscle, Smooth, VascularVasodilator AgentsNitric OxideArteriesCapillariesCheekCerebral ArteriesVasomotor SystemRegional Blood FlowVasoconstrictor AgentsRats, Sprague-DawleyMicroscopy, VideoJuxtaglomerular ApparatusVascular ResistanceAcetylcholineNitroprussideBlood PressureNitroarginineNitric Oxide SynthaseNG-Nitroarginine Methyl EsterBlood Flow VelocityMesoporphyrinsRenal CirculationNeovascularization, PhysiologicEnzyme InhibitorsNitric Oxide Synthase Type IIIRetinal VeinMuscle TonusMuscle, SkeletalSwineCorrosion CastingMesocricetusSwine, MiniatureNorepinephrineDose-Response Relationship, DrugRats, WistarRats, Inbred WKYHydronephrosisIndomethacinAdenosineMesenteryKidney GlomerulusRats, Inbred SHRNeovascularization, PathologicMesenteric ArteriesStress, MechanicalEndothelial CellsKidneyPotassium Chloride15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidImmunohistochemistryBradykininCoronary CirculationRabbitsModels, CardiovascularPerfusionTime FactorsDisease Models, AnimalLymphatic SystemAngiotensin IIMyographyPericytesSplanchnic CirculationOxygenHydrazinesCollateral CirculationVeinsMice, Inbred C57BLHypertensionCyclooxygenase InhibitorsProstaglandinsBiological FactorsEndothelin-1GlyburideMicrovesselsVascular Endothelial Growth Factor ACyclic N-OxidesCapillary PermeabilityPotassium Channel BlockersArgininePhenylephrineHemodynamicsBrainHindlimbIschemiaSuperoxidesRenal ArteryAntigens, CD31