14. Lung Cells: Renewal and Repair
Alveolar cells, which line the tiny air sacs in your lungs, are regularly renewed every few months. This ongoing replacement supports healthy breathing by maintaining the delicate structures needed for gas exchange.
When the lungs are exposed to injury or pollutants, this rapid turnover helps repair and restore function, reducing long-term damage. The process is vital for respiratory health and resilience. For more information, see NCBI: Lung Regeneration.