Do lungs heal themselves?
Hello. I am wondering if the lungs heal themselves. I have heard something to that effect, by the use of some kind of mucus.
I know that for chronic smokers, the lung damage is permanent due to the think chemicals such as tar that bond to the lung wall.
But for less intense chemicals, can the lung clean themselves?
For example, if I were to constantly be around dust that got in my lungs, or for those who smoke a lot of marijuana, do the lungs clear themselves of dust and ash?
I am so curious.