Scientists have advanced the breakthrough complex densely difficulties flow functional future generation healthy how method more organs possibility professor technique therapy transplants tubes use of reproducing the body's organs via the breakthrough complex densely difficulties flow functional future generation healthy how method more organs possibility professor technique therapy transplants tubes use of 3D printing. Scientists could replace breakthrough complex densely difficulties flow functional future generation healthy how method more organs possibility professor technique therapy transplants tubes use by using a new bio-printing breakthrough complex densely difficulties flow functional future generation healthy how method more organs possibility professor technique therapy transplants tubes use . This allows scientists to create networks of thin breakthrough complex densely difficulties flow functional future generation healthy how method more organs possibility professor technique therapy transplants tubes use , like those used in our body for the breakthrough complex densely difficulties flow functional future generation healthy how method more organs possibility professor technique therapy transplants tubes use of blood and air. These are called vascular networks. A bio-engineering professor explained why the breakthrough complex densely difficulties flow functional future generation healthy how method more organs possibility professor technique therapy transplants tubes use was important. He said: "One of the biggest roadblocks to generating breakthrough complex densely difficulties flow functional future generation healthy how method more organs possibility professor technique therapy transplants tubes use tissue replacements has been our inability to print the breakthrough complex densely difficulties flow functional future generation healthy how method more organs possibility professor technique therapy transplants tubes use [vascular networks] that can supply nutrients to breakthrough complex densely difficulties flow functional future generation healthy how method more organs possibility professor technique therapy transplants tubes use populated tissues." Another breakthrough complex densely difficulties flow functional future generation healthy how method more organs possibility professor technique therapy transplants tubes use wrote about the breakthrough complex densely difficulties flow functional future generation healthy how method more organs possibility professor technique therapy transplants tubes use scientists had in recreating vascular networks. She said: "Tissue engineering has struggled with this for a breakthrough complex densely difficulties flow functional future generation healthy how method more organs possibility professor technique therapy transplants tubes use ." She thinks the breakthrough will allow medicine to change in the breakthrough complex densely difficulties flow functional future generation healthy how method more organs possibility professor technique therapy transplants tubes use . She asked: "If we can print tissues that look and now even breathe more like the breakthrough complex densely difficulties flow functional future generation healthy how method more organs possibility professor technique therapy transplants tubes use tissues in our bodies, will they also then functionally behave breakthrough complex densely difficulties flow functional future generation healthy how method more organs possibility professor technique therapy transplants tubes use like those tissues?" She added that how well bio-printed tissue functions will affect breakthrough complex densely difficulties flow functional future generation healthy how method more organs possibility professor technique therapy transplants tubes use successful it will be as a breakthrough complex densely difficulties flow functional future generation healthy how method more organs possibility professor technique therapy transplants tubes use . Scientists hope this breakthrough complex densely difficulties flow functional future generation healthy how method more organs possibility professor technique therapy transplants tubes use will help millions waiting for organ breakthrough complex densely difficulties flow functional future generation healthy how method more organs possibility professor technique therapy transplants tubes use .