Pulmonary Gas ExchangeOxygenOxygen IsotopesVentilation-Perfusion RatioOxygen ConsumptionNoble GasesBlood Gas AnalysisArrhythmia, SinusCarbon DioxideRespirationPulmonary CirculationLungPulmonary Diffusing CapacityPhysical ExertionPartial PressureRespiratory MechanicsRespiratory Dead SpaceExerciseExercise TestGasesTidal VolumePulmonary VentilationRespiratory Function TestsWaterSmoke Inhalation InjuryPulmonary EdemaKineticsHyperoxiaKneePhosphatesRespiration, ArtificialHepatopulmonary SyndromeHyperventilationAnoxiaCardiac OutputExtravascular Lung WaterHemodynamicsRespiratory Distress Syndrome, AdultMuscle, SkeletalAdenosine TriphosphateBicyclingMyosinsPulmonary AlveoliMyosin SubfragmentsLung DiseasesHydrolysisAdenosine DiphosphateVital CapacitySpirometryCatalysisIsotope LabelingHeart RateMusclesRespiratory TransportDogsAdenosine TriphosphatasesLactic AcidRabbitsHydrogen-Ion ConcentrationForced Expiratory VolumeReactive Oxygen SpeciesTime FactorsLung Volume MeasurementsDeuterium Exchange MeasurementNeonPositive-Pressure RespirationExchange Transfusion, Whole BloodInhalationWater Loss, InsensibleSister Chromatid ExchangePlant TranspirationModels, BiologicalOxygen Inhalation TherapyPhotosynthesisLiquid VentilationPlant Leaves