FIG. 1.

Schematic of a lung device and the corresponding breathing mechanism. (a) Morphology of the lungs was designed focusing on human lung region between the 15th and 19th generations of the bronchiolar compartment and 20th and 23rd generations of the alveolar compartment. (b) Illustration of alveolar motion within lung device controlled by a scripted pumping system with inspiration and expiration of lung model being manipulated by switching the peristaltic pump on and off, respectively. (c) Exploded view of lung device comprising 21 patterned layers, some of which have been combined together for better visualization and description.