Short Answer: Yes they do.
Longer Answer: Cilia are tiny hair like structures in your lungs that sweep away dust and debris. These cilia become paralyzed by smoking thus reducing a natural cleaning...
I would venture to say that lungs do not regenerate. They may heal which technically is not the same process. The liver is the only organ that can regenerate.
When you have lung cancer, there is a mass or a collection of cancer cells in the lungs. The cancer cells will be spreading out to other organs of the body (metastasis). What happens to the lungs is...