Figure 1.

Microscale hydrogels as tissue building blocks: (A–D) schematic diagram of the techniques to microengineer hydrogels with controlled size and shape: emulsification (A), photolithography (B), microfluidics (C) and micromolding (D). (E) Versatility in microgel shapes: microgels can be molded into various shapes such as square, prisms, disks and strings.³⁷