HyperoxiaAnoxiaOxygenCell HypoxiaCarotid BodyOxygen ConsumptionAnimals, NewbornPartial PressureHyperbaric OxygenationLungChemoreceptor CellsHypoxia-Inducible Factor 1, alpha SubunitPulmonary AlveoliCarbon DioxideRespirationAltitudeBlood Gas AnalysisIon-Selective ElectrodesHypercapniaPulmonary VentilationRats, Sprague-DawleyRetinal VesselsRespiratory MechanicsPulmonary CirculationRetinopathy of PrematurityHypoxia-Inducible Factor 1Pulmonary ArteryLung InjuryBronchopulmonary DysplasiaRetinal NeovascularizationAirProcollagen-Proline DioxygenasePneumocytesAtmospheric PressureAcclimatizationOxidative StressTidal VolumeTime FactorsRNA, MessengerMicroscopy, Electrochemical, ScanningHyperventilationDisease Models, AnimalPlethysmography, Whole BodyHypocapniaOxygen Inhalation TherapyOxyhemoglobinsApneaVasoconstrictionNitric OxideVascular Endothelial Growth Factor AMice, Inbred C57BLCells, CulturedSuperoxide DismutaseExerciseFetal HypoxiaReactive Oxygen SpeciesPulmonary EdemaHypoxia, BrainRegional Blood FlowHypertrophy, Right Ventricular