262890.fig.002a
(a)
262890.fig.002b
(b)
262890.fig.002c
(c)
262890.fig.002d
(d)
Figure 2: Tissue slices of PSFFs at different time (×100). (a, b, c, and d are the images at 5 d, 10 d, 18 d, and 23 d after implantation; : venules : arteriole; : porous silk fibroin film; bar: 100 μm).