Figure 7: Fluorescence images of rat myoblasts (a) and CHO cells (b) growing for one day on grooved substrata. The cells were stained with the membrane dye PKH26 before seeding. The grooves were oriented vertically. Arrows indicate filopodia or cell protrustions aligned with the grooves. The myoblast cell shown in the upper right panel has partially internalized the dye. Scale bars, 10  m.