Across
- 4. Separates left and right sides of the heart
- 7. Chambers that pump blood to parts of the body
- 9. Blood rich in oxygen
- 11. Vessels that take blood away from the heart
- 12. Vessel that carries blood to all parts of the body
- 13. Initiates heart beat
Down
- 1. Ensures unidirectional flow of blood
- 2. Double walled membrane of the heart
- 3. Blood rich in carbon dioxide
- 5. Brings blood from the lungs to the heart
- 6. Brings blood to the right auricles
- 7. Vessels that bring blood towards the heart
- 8. Circulation between heart and body parts
- 10. Muscles of the heart