Across
- 6. fluid that carries cells, nutrients, and waste
- 8. upper left heart chamber receiving oxygen rich blood
- 11. heart contraction phase that ejects blood
- 12. liquid part of blood carrying cells and nutrients
- 14. valve between left atrium and ventricle preventing backflow
- 15. vessels returning blood to the heart
- 17. lower right chamber pumping blood to lungs
- 18. sac surrounding the heart reducing friction
- 19. protein in red blood cells that binds oxygen
- 21. relaxation phase of the heart chambers fill with blood
- 23. upper right chamber receiving deoxygenated blood
- 24. heart, vessels, and blood
Down
- 1. red blood cells that transport oxygen
- 2. tiny vessels where exchange of gases and nutrients occur
- 3. valve between right ventricle and pulmonary artery
- 4. valve between the right atrium and ventricle
- 5. valve between left and right ventricle
- 7. inner lining of heart chambers and valves
- 9. muscular heart wall that contracts
- 10. lower left chamber pumping blood into the aorta
- 13. vessels that carry oxygen rich blood away from the heart
- 16. wall separating the hearts left and right
- 20. white blood cells for immunity
- 22. platelets that aid with clotting