ArteriolesCell WallPia MaterVasodilationVenulesRetinal ArteryVasoconstrictionMicrocirculationThoracic WallAbdominal WallVasodilator AgentsMuscle, Smooth, VascularNitric OxideCheekEndothelium, VascularJuxtaglomerular ApparatusMicroscopy, VideoVasomotor SystemArteriesRats, Sprague-DawleyVasoconstrictor AgentsCapillariesCoronary VesselsCerebral ArteriesRegional Blood FlowAcetylcholineNitroarginineNitroprussideBlood PressureMesoporphyrinsNG-Nitroarginine Methyl EsterRenal CirculationSwine, MiniatureNitric Oxide SynthaseVascular ResistanceEnzyme InhibitorsMesocricetusMuscle, SkeletalStress, MechanicalHydronephrosisNitric Oxide Synthase Type IIIRetinal VesselsKidney GlomerulusMuscle TonusSwineAdenosineIndomethacinRats, Inbred WKYRats, Inbred SHRRats, WistarDose-Response Relationship, DrugNorepinephrineKidneyPotassium ChlorideBlood Flow VelocityModels, CardiovascularMicrovesselsHydrazinesBradykininCoronary Circulation15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidAngiotensin IIPerfusionRetinal VeinRabbitsHypertensionCyclic N-OxidesProstaglandinsCyclooxygenase InhibitorsOxygenSplanchnic CirculationGlyburideBlood VesselsPotassium Channel BlockersCorrosion CastingMesenteryPimozideTime Factors