Across
- 1. Wall dividing left and right sides of heart
- 5. Valve between left atrium and left ventricle
- 6. Heart muscle layer
- 8. Fluid that transports oxygen and nutrients
- 9. Sac surrounding and protecting the heart
- 13. Upper chamber receiving oxygenated blood
- 15. Heart relaxing/filling phase
- 18. Chamber pumping blood to lungs
- 20. Upper chamber receiving blood from body
- 23. Inner lining of the heart
- 24. Chamber that pumps blood to the body
- 25. Vessels carrying blood toward the heart
Down
- 2. Liquid portion of blood
- 3. Valve controlling flow to pulmonary artery
- 4. Valve between right atrium and right ventricle
- 7. System that moves blood through the body
- 10. Platelets involved in clotting
- 11. White blood cells
- 12. Microscopic vessels for gas exchange
- 14. Controls blood flow from left ventricle into aorta
- 16. Heart contracting/pumping phase
- 17. Red blood cells
- 19. Irregular heartbeats
- 21. Oxygen-carrying protein in red blood cells
- 22. Vessels carrying blood away from the heart