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