Coincident with the convergence of a unique layered solid freeform fabrication (SFF) technologies along with microfabrication techniques, a three-dimensional bioprinted micro-organ can serve as an in vitro platform for cell culture, drug screening, or to elicit further biological insights, particularly for NASAs interest of a flight-suitable high-fidelity microscale platform to study drug metabolism in space and planetary environments. This book details the principles, methodology, and engineering science basis that undergird the direct cell writing fabrication process development...