Across
- 4. muscles ... when they tighten
- 7. The bottom chamber
- 8. The heart consists of 4 ...
- 9. carries blood from the heart
- 10. when the heart relaxes and the chambers can refill with blood
- 12. The heart is left from the ...
- 13. moves blood back to the heart
Down
- 1. every heartbeat is caused from ...
- 2. The body's largest artery
- 3. The aorta is made up of ....
- 5. when the heart contracts and blood is pumped
- 6. Wall of muscle that separates the heart
- 11. The top chamber