Across
- 2. carries oxygen-poor blood and returns to the heart
- 4. doors of the heart
- 5. carries oxygen-rich blood to body cells
- 6. middle layer of heart
- 7. cane-shaped vessel
- 8. used to treat arrhythmias with small device
- 9. a cavity or passage
- 10. tissue wall separating the heart's right and left side
Down
- 1. two lower chambers of the heart
- 3. carries blood to the heart through large vein
- 6. feed the tissue and collect waste