Who needs transplants
However, the technology is still a good 5-10 years from practical applications of even the simplest sort.
So far, they've made tubes similar to human blood vessels and sheets of heart muscle cells, printed in three dimensions on a special printer.
"I think this is going to be a biggie," said Glenn D. Prestwich, the University of Utah professor who developed the bio-paper. "A lot of things are going to be a pain in the butt to print, but I think we can do livers and kidneys as well."
Prestwich guessed initial human organ printing may be five or 10 years away.
The work started as a way to understand biological self-assembly -- such as how an embryo develops -- in the lab, Forgacs said.