1) What does the heart do? a) Cleans your teeth. b) Removes waste from your body. c) Helps you to ear. d) Pump blood around the body. 2) What do your muscles need in order to work? a) Sun b) Rain c) Carbon Dioxide d) Oxygen 3) Where is the heart located in your body? a) In your brain b) Between the lungs c) Stomach d) In your throat 4) What helps the blood from flowing backwards in your heart? a) Valves b) A hole c) Water d) Oxygen 5) Where does blood enter the heart? a) Blood vessels b) Aorta c) Veins d) Your lungs 6) How big is your heart? a) The size of your closed fist. b) The size of a football. c) The size of your head. d) The size of a tennis ball 7) How much is in your body? a) 15 litres b) 5 litres c) 1.5 litres d) 500 litres 8) What happens to your heart when you exercise? a) Beats faster b) Slows down c) Rests d) Stops workings 9) How does carbon dioxide get released from your body? a) You breathe it in. b) You breathe it out. 10) Why is the heart the hardest working muscle in your body? a) It only works when you talk. b) It only works when you eat. c) It doesn't beat when you sleep. d) It never stops working.

Heart

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