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http://www.engadget.com/2014/06/02/3d-printed-blood-vessels/
"they've 3D printed vessels using a new technique that allows for intricate yet capable designs. Their process first prints agarose (sugar-based molecule) fibers as templates for the vessels, and then covers that in jelly-like hydrogel to produce a cast. Since the agarose is sturdy, scientists can pull it out to create channels without damaging any cells inside the gel; the resulting vessels are much better at transporting liquid and otherwise behaving like the real deal."
"they've 3D printed vessels using a new technique that allows for intricate yet capable designs. Their process first prints agarose (sugar-based molecule) fibers as templates for the vessels, and then covers that in jelly-like hydrogel to produce a cast. Since the agarose is sturdy, scientists can pull it out to create channels without damaging any cells inside the gel; the resulting vessels are much better at transporting liquid and otherwise behaving like the real deal."
