3D-printed skin stretches, bleeds like the real thing

Capsules embedded between layers of this fake tissue simulate human blood and pus. Small 3D-printed liquid capsules inserted between layers of tissue burst open, mimicking blood, when surgeons make an incision. Breakthroughs, discoveries, and DIY tips sent every weekday. Budding surgeons may soon train on stretchy, lifelike 3D-printed skin that oozes out blood and pus when cut. A new printable material developed by researchers at the University of Minnesota Twin Cities more closely mimics the adaptive nature of human tissue.