Across
- 2. Keeps blood from flowing backwards
- 5. Smallest blood vessels
- 7. Take blood back to the heart
- 10. Part of the circulatory system; the pump
- 12. Top chambers of the heart
- 13. Take blood away from the heart
- 15. Blood that has oxygen
- 16. Where blood gets oxygen from
Down
- 1. Bottom chambers of the heart
- 3. Help clot blood
- 4. Blood that is low in oxygen
- 6. Having to do with the lungs
- 8. Another name for the circulatory system
- 9. Rooms of the heart
- 11. Largest artery in the body
- 14. Wall separating right and left chambers of the heart