This program begins by looking at a typical day in the life of a cystic fibrosis sufferer. The structure and function of the lungs are seen through a mixture of computer graphics and real-life video. The problems encountered with cystic fibrosis are compared with the functioning of a normal healthy lung. The program provides a complete introduction to the following topics: The lungs and associated organs Ventilation of the lungs and gas exchange The role of mucus in the body Causes and symptoms of cystic fibrosis Applications of enzyme technology to modern medicine Measurement of lung function Genetic diseases and gene therapy.