Circulatory and Respiratory System Review

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