Budding surgeons may soon train on stretchy, lifelike 3D-printed skin that oozes out blood and pus when cut. These casts are invaluable tools for teaching surgeons, but they fall short of being a true one-to-one proxy for cutting into real human skin. A time-lapse video released by the researchers shows the bioprinter laying down layers of synthetic skin with liquid-filled capsules embedded between them. Image: McAlpine Research GroupWe’re quickly approaching an era of printable body partsSimulated, synthetic skin has advanced rapidly from a sci-fi concept to real-world application in recent years. Though still in the research phase, that team believes it could mimic human skin accurately enough to replace the current need for animal skin in cosmetic testing.