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A 3D-printed hydrogel model of a lung-mimicking air sac in which airways deliver oxygen to surrounding blood vessels is shown April 30 in the Rice University BRC lab in Houston. HOUSTON — More than 100,000 people in the U.S. are stuck on an organ transplant wait list, hoping to find that perfect match to their blood type, body size and hospital location. But many — 20 per day, in fact — will die before receiving the organ they need. The Houston Chronicle reports imagine, then, if scientists could just print one for them using a method similar to 3D printing. Jordan Miller, a Rice University bioengineer, has been working toward this goal for the past five years. It’s more complicated than it sounds: 3D printing originally was created for use with plastics, which are not compatible with the human body. “Tissue engineering has struggled with this for a generation,” […]