Staying Alive - Key Words

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Across
  1. 1. Prevent backflow of blood in veins and the heart.
  2. 5. A change that is detected by the body.
  3. 7. Another name for hormone system.
  4. 9. Detect changes (e.g. in the eyes, tongue, ears)
  5. 10. Action that is done without thinking.
  6. 12. The body system that involves the heart.
  7. 16. Component responsible for clotting and scabs.
  8. 18. Breathing in - opposite of exhale.
  9. 19. Neurones that carry impulses to effector organs.
  10. 20. The sheet of muscle under the lungs.
  11. 23. The gas that we need to live.
  12. 24. Another word for breathing system.
  13. 25. What hormones travel in.
Down
  1. 2. The main organ involved in breathing.
  2. 3. Hormones are ... messengers.
  3. 4. Blood cell that fights disease.
  4. 5. Neurones that carry impulses to the spinal cord
  5. 6. Vessel that carries blood away from the heart.
  6. 8. Responds to a change.
  7. 11. The 'master gland'
  8. 13. We test for carbon dioxide using this.
  9. 14. Where hormones are released from.
  10. 15. Yellow substance that transports sugars and waste.
  11. 17. 'Fight or flight' hormone
  12. 21. Thin blood vessel where gas exchange occurs.
  13. 22. Blood cell responsible for transporting oxygen.