Figure 1: Images of BAM seeded with MSCs from human umbilicus taken by Scanning Electron Microscope (SEM). A At 5 days the cells migrate and proliferate inside BAM (magnification ×2400). B At 10 days MSCs from human umbilicus fill in the surface of BAM (magnification ×1200). Source: Yuan H, Zhuang Y, Xiong J, Zhi W, Liu L, Wei Q, Han P. Human umbilical mesenchymal stem cells-seeded bladder acellular matrix grafts for reconstruction of bladder defects in a canine model. PLoS One. 2013 Nov 20;8(11):e80959. doi: 10.1371/journal.pone.0080959. eCollection 2013.