Doctors Could 3D-Print Micro-Organs with New Technique

Gone are the days when 3D printers merely built plastic trinkets — scientists say 3D-printed structures loaded with embryonic stem cells could one day help doctors print out micro-organs for transplant patients. Embryonic stem cells, obtained from human embryos, can develop into any kind of cell in the body, such as brain tissue, heart cells or bone. Scientists typically experiment with embryonic stem cells by dosing them with biological cues that guide them toward developing into specific