Across
- 4. The gas we exhale
- 7. The organ used for breathing
- 8. The amount of times your heart beats per minute
- 10. The smallest blood vessel
- 12. Carries deoxygenated blood to the heart
- 13. The side of the heart that pumps blood to the body
Down
- 1. The amount of times we breathe air in and out in a minute
- 2. The big muscle used for breathing
- 3. The rhythmic pressure of blood in your blood vessels2
- 5. The side of the heart that pumps blood to the lungs
- 6. Exercise .... our breathing and heartrate
- 8. The organ that pumps blood around the body
- 9. The gas we breathe in
- 11. Carries oxygenated blood away from the heart