Cartilage, ArticularBone Morphogenetic ProteinsBone Morphogenetic Protein 2Bone Morphogenetic Protein 4Bone Morphogenetic Protein 7CartilageBone Morphogenetic Protein Receptors, Type IBone Morphogenetic Protein ReceptorsBone Morphogenetic Protein 6Bone Morphogenetic Protein Receptors, Type IIBone and BonesBone Morphogenetic Protein 5ChondrocytesCartilage DiseasesSmad1 ProteinSmad ProteinsBone Morphogenetic Protein 3OsteoarthritisSmad5 ProteinProteoglycansTransforming Growth Factor betaBone Morphogenetic Protein 15Bone Morphogenetic Protein 1Bone RemodelingKnee JointSmad6 ProteinAggrecansOsteogenesisSignal TransductionChondrogenesisSmad8 ProteinCell DifferentiationCollagen Type IIStifleGrowth Differentiation Factor 5GlycosaminoglycansOsteoarthritis, KneeExtracellular Matrix ProteinsFemurBone RegenerationOsteoblastsBone DevelopmentGrowth Differentiation Factor 2Bone DensityCells, CulturedCollagenTibiaReceptors, Growth FactorGene Expression Regulation, DevelopmentalHyaline CartilageGrowth Differentiation FactorsCattleBone MatrixNasal CartilagesMenisci, TibialJointsWeight-BearingGrowth Differentiation Factor 9PatellaFractures, CartilageBone ResorptionGrowth PlateIntercellular Signaling Peptides and ProteinsStress, MechanicalTissue EngineeringCompressive StrengthActivin Receptors, Type ICalcification, PhysiologicMicroscopy, PolarizationFemur HeadBone DiseasesRNA, MessengerActivinsIn Situ HybridizationGrowth Differentiation Factor 6Bone NeoplasmsMesodermBiomechanical PhenomenaAlkaline PhosphataseBone MarrowExtracellular MatrixSmad4 ProteinReverse Transcriptase Polymerase Chain ReactionImmunohistochemistryBone Marrow CellsActivin Receptors, Type IIBone TransplantationProteinsMatrix Metalloproteinase 13Body PatterningLubricationTissue Culture TechniquesOssification, HeterotopicFollistatinEar CartilageCarrier ProteinsOsteochondritisCore Binding Factor Alpha 1 SubunitLaryngeal CartilagesActivin Receptors