your heart speeds up so more blood can reach your muscles. Muscles use oxygen to create the stuff needed for the work in exercise.your heart rate returns to its normal or resting rate fairly quickly
There never seems to be enough hours in the day
Conservation is the act of guarding, preserving and protecting. So conserving will help reduce air pollution because instead of letting thing go to the wrong garbage or whatever you can save and conserve and even reuse. decreases air pollution.
Muscular and connective tissues.
