What does the circulatory system control? question 1 options: digestion flow of oxygen flow of blood nerves what does the respiratory system control? question 2 options: digestion flow of oxygen flow of blood nerves the purpose of aerobic exercise is question 3 options: you lose weight build muscle mass boost your heart rate and oxygen intake all of the above the benefits of aerobic exercise are question 4 options: increase in lung capacity lowered blood pressure stronger heart muscles all of the above the ‘f’ in the f. i.t. t. principle stands for question 5 options: fitness fabulous frequency football