Driving Lung Cell Formation (IMAGE) Boston Children's Hospital Caption The lung must maintain two key cell populations: bronchiolar cells, also known as airway cells (left), and alveolar epithelial cells, where gas exchange takes place (right). A new study eavesdrops on the crosstalk that determines which cell types are made. Credit Joo-Hyeon Lee (Boston Children's Hospital/Cambridge Stem Cell Institute UK) Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.