The effects of aging on the respiratory system are similar to those that occur in other organs:maximum function gradually declines. Age-related changes in the lungs include
:
Decreases in peak airflow and gas exchange
Decreases in measures of lung function such as vital capacity (the maximum amount of air that can be breathed out following a maximum inhalation)
Weakening of the respiratory muscles
Decline in the effectiveness of lung defense mechanisms
Ok. I am not very sure if my answer is correct. I suggest to look further into it. But I do believe it is True. Check if others say the same because i am not that sure.