Across
- 3. Blood vessel that takes blood to the lungs
- 4. Lower right chamber that pumps blood to the lungs
- 8. Lower left chamber that pumps blood to the body
- 9. Thick, muscular middle layer of the heart
- 10. Large vein that brings blood from the lower body to the heart
- 11. Blood vessel that brings blood back from the lungs
- 12. Upper left chamber of the heart
- 14. Biggest artery that carries blood from the heart to the body
- 15. Flap between the left atrium and left ventricle
- 16. Big vessel that carries blood from the heart to the lungs
- 17. Upper right chamber of the heart
Down
- 1. Large vein that brings blood from the upper body to the heart
- 2. Flap that controls blood going into the aorta
- 5. Flap between the right atrium and right ventricle
- 6. Heart flap that controls blood flow to the lungs
- 7. Outer covering that protects the heart
- 13. Inner lining of the heart