Microscopic Image of Cells Lining the Lung (image) The Francis Crick Institute Share Print E-Mail Caption Scanning electron micrograph of epithelial cells lining the inside of the lung. Different cell types with different shapes and different functions compose this inner lining, and the right balance between these cell types is important for a healthy lung. Credit Andreas Wack, Francis Crick Institute Usage Restrictions None Share Print E-Mail 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.