Renal CirculationRenal ArterySplanchnic CirculationKidneyVasoconstrictionVascular ResistanceRegional Blood FlowReninHemodynamicsBlood PressureAngiotensin IINitric OxideVasodilationBlood CirculationExtracorporeal CirculationPulmonary CirculationCollateral CirculationEnterohepatic CirculationCoronary CirculationCerebrovascular CirculationPlacental CirculationBlood Circulation TimeLiver Circulation