HydraInhalationRespirationRespiratory MechanicsTidal VolumeExhalationDiaphragmAirway ResistanceCnidariaPhrenic NerveRespiratory MusclesIntercostal MusclesRespiratory Physiological PhenomenaPulmonary VentilationBronchoconstrictor AgentsAbdominal MusclesMethacholine ChlorideChlorellaLung Volume MeasurementsThoraxPressureBronchoconstrictionFunctional Residual CapacityInspiratory CapacityLaryngeal NervesHeadRibsPulmonary Stretch ReceptorsWork of BreathingLungAirway ObstructionTotal Lung CapacityVagotomyRespiratory CenterVagus NerveAir Pressure