Fig. 1

Appearance of different stem cells under inverse microscope. Under inverse microscopy, cultured rat bone marrow mesenchymal stem cells (rBMSCs, (a) human adipose tissue-derived mesenchymal stem cells (hADSCs, (b) and human amniotic fluid-derived mesenchymal stem cells (hAFSCs, (c) at passage 3 were morphologically defined by the fibroblast-like appearance (original magnification × 200)