Fig. 3From: Exosomes derived from M2 macrophages prevent steroid-induced osteonecrosis of the femoral head by modulating inflammation, promoting bone formation and inhibiting bone resorptionHistopathological changes in the femoral heads of the different groups by hematoxylin-eosin staining. (A) Representative images of hematoxylin-eosin staining. Black blocks indicate the magnified area. (B) The ratio of empty lacunae in different groups. N = 5 per group.*p < 0.05 compared with Normal group; #p < 0.05 compared with Model groupBack to article page