Figure 4.
Images of acellular prints of different shapes and geometries printed with M3 bioprinter. (a) Harvard Logo. (b) Spiral (inset: top view). (c, d) Solid and hollow pyramids (inset d: uncut hollow). (e) Hollow cylindrical tube with a serial ink change in a spiral (left) and horizontal (right) switching for red and green inks. (f, g) Transverse section fluorescence microscopy images of the outer and the inner walls of the right cylinder in panel e, respectively, showing that the resolution is maintained at a single fiber level at both the inside and outside of the printed construct.