Across
- 3. it carries blood away from the heart
- 4. where an artery and a vein meet
- 7. type of muscle
- 9. the lower two parts of the heart
- 10. the two upper parts of the heart
Down
- 1. a very large vein
- 2. it carries blood towards the heart
- 5. it makes sure your heartbeat is stable
- 6. it is the wall that separates the right and left side of the heart
- 8. the main artery
- 9. what opens and closes to keep the blood moving