Cardiovascular and Respiratory Systems

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Across
  1. 2. The nerve going to the diaphragm
  2. 4. The volume of air expired per breath
  3. 9. The name of the shift for oxygen dissociation
  4. 11. The nerve which increases the heart rate
  5. 12. Feedback about movement in the body
  6. 15. The muscle that assist with expiration during exercise
  7. 16. When the heart rate levels out
  8. 18. The widening of the blood vessels
  9. 20. A feedback mechanism which detects pH levels
  10. 22. The movement of gases
Down
  1. 1. The rise in heart rate before exercise
  2. 3. The node which acts as your pace maker
  3. 5. The relaxation of the heart
  4. 6. The hormone released to increase heart rate
  5. 7. The blood vessel taking blood from the left ventricle
  6. 8. The name of the bottom parts of the heart
  7. 10. The number of breaths taken per minute
  8. 13. A muscle involved in breathing
  9. 14. There are both internal and external types of these
  10. 17. Where gas exchange takes place in the lungs
  11. 19. One of the methods of improving venous return
  12. 21. The valve separating the right atria to ventricle