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Scientists say they have greatly the possibility of able to reproduce the body's organs via the use of 3D printing. Replacement organs could created using a new technique for bio-printing organic tissue. This scientists to create networks of thin tubes and vessels, like those in our body for the flow of blood and air. These are vascular networks. Bio-engineering professor Jordan Miller why the breakthrough was so important. He said: "One of the biggest roadblocks to generating functional tissue replacements has our inability to the complex [vascular networks] that can nutrients to densely populated tissues."

Professor Kelly Stevens of the University of Washington about the difficulties scientists had in recreating a vascular network. She : "Tissue engineering has with this for a generation." She the new breakthrough will allow medical practices to change in the future. She asked: "If we can print tissues that look and now even more like the healthy tissues in our bodies, will they also then functionally more like those tissues?" Professor Stevens said "This an important question, because how well a bio-printed tissue functions will how successful it will as a therapy." Scientists hope this method will help millions of people for an organ transplant.