The struggle to recreate human tissues in the laboratory is nearly as old as the medical profession itself. The cell as you all know, is the structural, functional and biological unit of all organisms, whether it is a single celled-bacteria or a 90 trillion-celled human! While these microscopic units appear simple, they are actually quite complex and almost impossible to build from scratch, which is why for the longest time 'growing' new human body parts in the laboratory seemed like an impossible task. That perception seems to be changing somewhat, thanks to the recent advent of 3-D printing.