When you exercise the heart muscle pumps more blood through the body. The blood is carried to all parts of the body. What is found in the blood that helps muscles perform during exericse?
A. Water
B. Nitrogen
C. Carbon Dioxide
D. Oxygen

Which of the following can be a community opportunity to play a team sport? basketball hang gliding hiking rollerblading which of the following breaks a safety rule? going to the gym while you have a contagious condition, like the flu or pink eye ignoring people who have been waiting to use your basketball court talking on your phone or texting during a yoga class walking out of a fairway sand trap without raking your footprints