Fig. 5

Histological results of the cartilage and meniscus, n = 5. a The histological staining of femoral cartilage in the three groups, the arrows indicated the poorly recovered region at cartilage layer, the squares indicated the obviously defect region at cartilage and subchondral bone, scale bar: 500 μm. b The histological staining of tibial cartilage in the three groups, the arrows indicated the poorly recovered region at cartilage layer, the squares indicated the obviously defect region at cartilage and subchondral bone, scale bar: 500 μm. c The histological staining of meniscus in the three groups, the regenerated region were indicated by the square, scale bar: 1000 μm