Across
- 3. the heart's job is to ___ blood
- 7. when you ___ your heart speeds up
- 8. ___ give our blood oxygen
- 10. the heart can fill 93 of these
- 12. the heart beats 100,000 times every ___
- 13. blood ___ in one direction
Down
- 1. we need our heart to ___
- 2. blood with ___ travels in arteries
- 4. the heart can squirt blood 10 ___ away
- 5. the heart can pump 1.3 of these every minute
- 6. ___ appear blue
- 9. ___ appear red
- 11. veins carry blood without oxygen from the ___