Across
- 6. Type of circulation where blood moves from heart to body and back to heart
- 7. carries oxygenated blood to the heart
- 12. type of circulation where blood moves from heart to lungs and back to heart
- 13. wall between the two ventricles
- 14. lower chambers of the heart
Down
- 1. present at the opening of pulmonary artery
- 2. carries deoxygenated blood to the lungs
- 3. Upper smaller chamber of the heart
- 4. prevents backflow of blood from left ventricle to left auricle
- 5. membrane surrounding the heart
- 8. node initiates heartbeat
- 9. prevents backflow of blood from right ventricle to right atrium
- 10. carries oxygenated blood to heart muscles
- 11. carries oxygenated blood from heart to body