Umbilical cord blood stem cells have been altered into lung cells, which U.S. researchers say opens up development for treatment of several lung diseases.  
The researchers were able to turn the cord blood cells into a lung cell called type II alveolar cells, a University of Minnesota news release said. The alveolar cells are responsible for secreting a substance that allows the lung's air sacs to remain open so air can move. The cells also help repair the airway.  
More fun with stem cells and lungs