TracheaBronchiPulmonary AlveoliBronchial NeoplasmsTracheal NeoplasmsLungBronchial DiseasesBronchoscopyBronchographyTracheal DiseasesGuinea PigsMuscle, SmoothTracheal StenosisRespiratory SystemEpitheliumBronchoconstrictionPulmonary SurfactantsPulmonary AtelectasisMuscle ContractionTooth SocketAerosolsAirway ObstructionHemoptysisBronchiolesLung ComplianceMuscle RelaxationCarcinoma, BronchogenicExocrine GlandsPulmonary Alveolar ProteinosisNeurokinin ARespiratory MucosaLung Volume MeasurementsIntubation, IntratrachealEpithelial CellsLung DiseasesTachykininsCell DivisionMammary Glands, AnimalMucusAirway ResistanceHistamineBronchoalveolar Lavage FluidLarynxTomography, X-Ray ComputedSurface TensionMicroscopy, ElectronBronchial ArteriesBronchial FistulaSubstance PTime FactorsBronchopneumoniaPulmonary Surfactant-Associated ProteinsLung NeoplasmsDogsBronchoalveolar LavageModels, BiologicalForeign BodiesRespiratory MechanicsPneumonectomyMethacholine CompoundsImmunohistochemistryAcetylcholinePulmonary EmphysemaTracheobronchomegalyMuscle TonusPulmonary CirculationPleuraPulmonary EdemaCapsaicinRespirationAlveolar ProcessRespiratory Tract NeoplasmsSRS-APulmonary ArteryPulmonary VentilationCarcinoma, Adenoid CysticPneumoniaTracheitisEndothelinsAnimals, NewbornAir PressureBronchoscopesDose-Response Relationship, DrugFiber Optic TechnologyCell DifferentiationAdministration, InhalationMacrophages, AlveolarSwineMicroscopy, Electron, ScanningPhysical PhenomenaMucous MembraneTracheotomySolanum glaucophyllumAlbuterolMucociliary ClearanceRespiration, ArtificialCarbacholVagus NerveTracheoesophageal FistulaMorphogenesis