Basal MetabolismIschemiaBrain IschemiaMyocardial IschemiaEnergy MetabolismOxygen ConsumptionReperfusion InjuryCalorimetry, IndirectBody Temperature RegulationBrainBody TemperatureBody SizeCerebrovascular CirculationBody WeightMetabolismMyocardial Reperfusion InjuryOxygenBody CompositionIschemic Attack, TransientReperfusionTomography, Emission-ComputedTime FactorsCarbon DioxideWater Loss, InsensibleWarm IschemiaGlucoseDeoxyglucoseFluorodeoxyglucose F18HibernationEnergy IntakeRats, Sprague-DawleyDeoxy SugarsCold IschemiaMyocardiumIschemic PreconditioningThermogenesisFlight, AnimalRats, WistarDisease Models, AnimalGerbillinaeSpinal Cord IschemiaDivingAcclimatizationPhysical ExertionRestTemperatureRespiratory TransportModels, BiologicalBirdsIschemic Preconditioning, MyocardialCold TemperatureHeartAnalysis of VarianceLactic AcidEstivationNeuroprotective AgentsHeart RateInfarction, Middle Cerebral ArteryMyocardial ReperfusionHypothermia, InducedCerebral InfarctionReptilesFluorine RadioisotopesMammalsLongevityBody ConstitutionBody WaterEatingHemodynamicsMuscle, SkeletalRespirationObesitySwimmingDogsAdipose TissueRegional Blood FlowFeeding BehaviorCerebral CortexCoronary CirculationSpecies SpecificityPerfusionPhysiology, ComparativeAgingHindlimbAnoxiaCalorimetryMice, Inbred C57BLAdaptation, PhysiologicalExerciseCharadriiformesLactatesBoidaeDesert ClimateOrgan SizeBlood PressureRadiopharmaceuticalsLegOxygen IsotopesFur SealsRegression Analysis