Can you Describe how bronchitis, emphysema, and lung cancer affect the respiratory system

Can you Describe how bronchitis, emphysema, and lung cancer affec…?

http://www.chacha.com/question/can-you-describe-how-bronchitis%2C-emphysema%2C-and-lung-cancer-affect-the-respiratory-system

Emphysema is a lung condition featuring an abnormal accumulation of air in the lung’s many tiny air sacs, a tissue called alveoli.