3-D printing can create jewelry, toys and tools -- and someday even human organs, if Keith Murphy gets his way. Murphy leads Organovo, which creates functional human tissues with proprietary bioprinting technology. The tissue can be used by researchers to test drugs before going into clinical trials, for example. This year, Murphy expects to hit a key milestone: the commercial launch of Organovo’s 3-D liver tissue product. The company is also working to create bioprinted kidney tissue, lung tissue, blood vessels, and breast cancer tissue.