1200px-emphysema_low_mag

Low magnification micrograph of emphysema. H&E stain. The left of image shows severe emphysema (large empty spaces). The lung tissue on the right of the image has relative preservation of the alveoli. The top of the image is very near the pleural surface | By Nephron – Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=7935360