1. An ear
So far, 3D bio printers had been used by scientists to create simple replicas of certain organs and thus be able to experiment with them instead of having to use real bodies. The interesting thing about this ear made by the Wake Forest Institute for Regenerative Medicine is that, among other materials, have been used living cells as ink. That is, with the method used by this institute will make living human tissues and structures of organs scale that could be used for surgical implantation, with more technological development.