Task: Question Answering
Input (English): Process:  -Air enters the lungs through bronchial tubes -Air enters bronchioles -Bronchioles have tiny air sacs called alveoli -Alveoli surrounded by small blood vessels -Oxygen absorbed by small blood vessels -Vessels deliver oxygen to every cell in the body -Blood brings carbon dioxide back to lungs -Carbon dioxide released when you exhale.
 Question: What is the effect of less heavy exercising on less oxygen to air sacs.?
Output (English): none