Rules You need to answer ALL questions correctly in order to move to the next level. Choose the BEST answer. When you answer ALL questions correctly you will be transported to the next level. You may take as many tries as you need. Good Luck! I hope you've been paying attention. 1. What is the main job of the circulatory system? Transport oxygen Transport nutrients Transport cell waste products All of the ABOVE 2. What are the three main parts of the circulatory system? Heart Blood Blood Vessels All of the ABOVE 3. Your circulatory system is approximately how long? Fifty feet 400 yards Thousands of miles Hundreds of miles 4. What are the basic building blocks of your body? Legos Cells Cinder blocks Lincoln Logs 5.How many cells are in your body? Millions Billions Trillions I don't know I've never counted 6. What do cells need to stay alive? Oxygen Nutrients Get rid of wastes All of the ABOVE 7. What waste product is produced by cells? Oxygen Carbon Monoxide Carbon Dioxide All of the ABOVE