BSIP S&I / SCIENCE PHOTO LIBRARY BSIP S&I / SCIENCE PHOTO LIBRARY
Healthy lung. Coloured bronchogram (X-ray) of the bronchial tree of a healthy human lung. At upper left is the trachea (windpipe, white), which branches into two bronchi, one in each lung. Each bronchus divides and subdivides into a network of branching airways called bronchioles. The bronchioles carry air to and from the alveoli (air sacs, not seen), where oxygen is absorbed and carbon dioxide released. The pale green stripes are the ribs. Bronchography renders the airways visible on X-ray film by introducing a radio- opaque medium into the windpipe. This technique is used to locate such lung disorders as an abscess or a lung tumour.
Model release not required. Property release not required.