Figure 2. Isolation and identification of rat bone marrow mesenchymal stem cells (rBMSCs). A, Morphological observation of rBMSCs in Sham and osteoporosis (OP) groups (scale bar: 100 μm). B, Surface marker identification of rBMSCs by flow cytometry in Sham and OP groups. C, Oil red O staining for rBMSCs in Sham and OP groups (scale bar: 100 μm).