Emphysema. Coloured 3-D computed tomography (CT) scan of the lungs, showing advanced emphysema of the right lung (left). Emphysema is a disease in which the tiny lung air sacs (alveoli, blue) become enlarged and the walls separating them are damaged. It is strongly associated with smoking. Two large areas of severe damage are at lower and upper left. The reduced surface area for gaseous exchange restricts oxygen uptake. This may cause breathlessness, bluish skin, and heart or respiratory failure. Treatment is with drugs and the cessation of smoking. For several CT scans of these lungs, see images M150/223-227.

Photo website with Rights Managed and Royalty Free stock photos, images, illustrations and footage available for download immediately for commercial and editorial uses. Aflo is a leading independent supplier and producer of stock pictures and visual content. Search and find high quality images and video for design, print, web-use and publishing. Buy photos from our extensive collection of model released and property released sports images. Search some of the most beautiful travel and landscape pictures from our own photographers and license from our large collection of content, modern and archive, focusing on Japan. We provide free research. Register for personal account management and for full use of our Stock Photography website and start to download images now.