“It gets really complex,” Anseth says, “when you start to think about how to regrow something like a liver, which has a complex metabolic function, a blood supply. You’d have to engineer blood vessels, engineer nerves, plus know how to culture the important cells in the liver.

“I think we’re a long way away from regenerating an organ,” she continues. “But I think that’s the holy grail of the field, and we’re working diligently.”