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Across 7. the opposite of carbon dioxide 11. something done to keep from pulling or straining a muscle 12. what you get when you are hurt 14. a sudden explosion/burst of speed 15. the frame for the human body 17. a type of fitness that is tested in schools 18. something that is needed to live and that hopefully everyone has 19. something everyone has

Down 1. the opposite of oxygen 2. a town in the IT book and movies 3. red and rich in iron 4. something commonly attributed to speed 5. a thing that you can have both mentally and physically 6. the ability to withstand something 8. the ability to keep your back straight 9. where two bones meet 10. a sport that dosen't require oxygen 13. something you need to keep up 15. the control centre of the body 16. what our body is fifty percent made up of