Body Systems Review Crossword

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Across
  1. 4. The organelle that makes ATP
  2. 9. The main sugar your body uses to make ATP
  3. 14. The part of the lungs where oxygen moves into the lungs
  4. 16. The chemical reaction that makes ATP
  5. 18. Your heart rate ______ when you exercise.
  6. 20. ______ blood cells fight infections.
  7. 21. A blood vessel that carries blood away from the heart
Down
  1. 1. A liquid that flows around the body to carry oxygen and nutrients to cells
  2. 2. Cells make up _____, and these make up organs.
  3. 3. A structure within the heart that ensures that blood only flows in one direction
  4. 5. The blood cell that carries oxygen
  5. 6. The chambers of the heart with thick muscular sides to squeeze blood out of the heart
  6. 7. To squeeze, as in the way a muscle moves
  7. 8. The gas that cells use to make ATP
  8. 10. The tiny blood vessels that allow oxygen and nutrients to flow into cells
  9. 11. The type of muscle that you can control by thinking about it
  10. 12. The organ that pumps blood
  11. 13. The part inside a bone where new blood cells are made
  12. 15. The organ that brings in oxygen
  13. 17. The muscle at the bottom of your ribcage that controls breathing
  14. 19. The molecule that cells use for energy