'Lung-on-a-chip' tests for drug toxicity?

The two Harvard researchers who earlier this year announced their ‘lung-on-a-chip’, designed to replicate real lungs in minature with human cells, received a $3.3 million Federal grant to use this system for testing the toxicity of cardiopulmonary drugs.  This possibly could eliminate animal testing, speed up the FDA process and in the future could aid in lung conditions.  SmartPlanetHarvard video.