CapillariesRegional Blood FlowBlood Flow VelocityElectrophoresis, CapillaryCerebrovascular CirculationCapillary ActionLaser-Doppler FlowmetryCapillary PermeabilityCapillary ResistanceMicrocirculationFlow CytometryBlood PressureVascular ResistanceHemangioma, CapillaryPulsatile FlowHemodynamicsMicrospheresXenon RadioisotopesPulmonary CirculationRetinal VesselsDogsCapillary ElectrochromatographyOxygenOxygen ConsumptionRenal CirculationCapillary Leak SyndromeBrainVasodilationRheologySplanchnic CirculationHyperemiaLiver CirculationTime FactorsCarbon DioxideEndothelium, VascularBlood VolumeTomography, Emission-ComputedIschemiaHeart RateBlood Circulation TimeUltrasonography, DopplerOxygen RadioisotopesArteriesModels, CardiovascularXenonCollateral CirculationPlethysmographyVasodilator AgentsMuscle, SkeletalArteriolesNeovascularization, PhysiologicGene FlowUltrasonography, Doppler, ColorCerebral ArteriesPerfusionPartial PressureCapillary FragilityVasoconstrictionRats, Sprague-DawleySkinNitric OxideBlood Gas AnalysisBlood VesselsHematocritUltrasonography, Doppler, TranscranialLegReproducibility of ResultsKidneyDisease Models, AnimalChoroidCorrosion CastingHindlimbReference ValuesVeinsRats, WistarAntipyrineBlood ViscosityAnoxiaSkin TemperatureFemoral ArterySwineCoronary CirculationMiddle Cerebral ArteryArteriovenous AnastomosisRetinal ArteryVasomotor SystemAdenosineSheepBrain IschemiaKidney GlomerulusRabbitsHeartPressureVenulesPhysical ExertionCapillary TubingNitroprussideLungHomeostasisTomography, Emission-Computed, Single-Photon