I made a model of the lungs in order to demonstrate one of the ways in which one could develop a pneumothorax. A pneumothorax is a condition that develops when air gets inside of the pleural space. This can occur from air escaping the lungs or air entering the the pleural space through a hole in the chest, which is called a “sucking chest wound”, as air is sucked into the chest with every breath. This extra air in the chest cavity can cause the lung to collapse. This will cause difficultly breathing, and in the worst cases can cause death if untreated as the pressure in the chest begins to compress the heart, decreasing cardiac output. Pneumothorax can also develop spontaneously, due to chronic lung conditions and genetic factors, as well as penetrating or blunt trauma.