When drugs are tested, it's helpful to have some kind of analog to test against before the drug is released for human trials. Scientists use animals (no, I don't like to think of that either) and other methods to do some of the testing, and now they have a practical substitute for human blood vessels or arteries.
GizmodoScientists from the Pratt School of Engineering at Duke University have published, in Scientific Reports, an innovative way of making blood vessels. This is more complicated than it sounds. Blood vessels are not simple things which can be described by that infamous phrase, “a series of tubes.” Each blood vessel is a layered structure, and those layers interact with each other. Making both of the layers can take weeks. The new technique can make them in hours.