What respiratory system changes occur when someone quits smoking ?

Your lung functioning begins to improve after just 30 days without smoking. As your lungs heal from the damage, you will likely notice that you experience shortness of breath and cough less often than you did when you smoked.

well when looking at this if you think about it   negativley and positivley   react with each other and when the first layer gets full they add layers it starts with 2 on the first layer and it constantly goes on until the official number is there

b

explanation:

because i can