What a fascinating piece to research and report.
From the article:
“Would-be organ printers previously have been stymied by the complexity of certain organs. Our lungs and livers, for example, contain physically and biochemically entangled networks of blood vessels and airways (in the lung) or bile ducts (in the liver). Being able to recreate this vasculature—and make the fluid dynamics work so blood and other fluids flow properly—has been an ongoing challenge.
Now, a team of researchers from the University of Washington and Rice University say they have produced functional tissue models using a 3-D printing technique called projection stereolithography. This method exposes thin layers of liquid resin to blue light, which solidifies them into intricate arrangements of hydrogels—gels made up of tangled strings of polymer molecules.”