Do You Wake Up at 4 A.M.? It Might Be Because of Your Lungs! Updated for 2024 CMCL 3 years ago You surely know the function of your lungs, right? The main role of the lungs is to do the gas exchange between blood and the environment. These changes happen in the lung alveoli. In this process, Related Video Posts Even Doctors Mistake This Vitamin Deficiency for Alzheimer's and Dementia How I Got Rid of My Plaque in Just 7 DAYS (And KEPT It Off for LIFE) The Foods That Are SILENTLY Destroying Your Brain (And How to Stop It)