What muscle contracts in the heart to eject the blood from the heart? a. aorta b. caudal vena cava c. atrioventricular node d. myocardium

Match the limiting factor with the correct definition. 1. learning about the benefits of exercise location/access 2. problem that can be solved by choosing free activities understanding 3. living close to a park motivation 4. how you were raised money 5. how you feel about yourself and your ability to exercise family behaviors