Pulmonary AlveoliRegenerationNerve RegenerationLiver RegenerationMacrophages, AlveolarBone RegenerationAlveolar ProcessPulmonary Alveolar ProteinosisGuided Tissue RegenerationAlveolar Bone LossRhabdomyosarcoma, AlveolarPlanariansHepatectomyAxonsSalamandridaeAmbystoma mexicanumExtremitiesNerve CrushBronchoalveolar Lavage FluidStem CellsCells, CulturedCell DifferentiationWound HealingNotophthalmus viridescensPneumocytesMice, Inbred C57BLCell ProliferationPulmonary SurfactantsAnimal FinsTissue EngineeringRats, Sprague-DawleyTissue ScaffoldsTime Factors