Across
- 5. Membrane surrounding the heart
- 6. Protein that carries oxygen
- 8. Fluid after clotting
- 11. Liquid portion of blood containing clotting factors
- 12. Lower chambers of the heart
- 13. Upper chambers of the heart
- 14. Smallest blood vessels
Down
- 1. Contraction phase of the heart
- 2. Heart relaxation phase
- 3. Carry blood away from heart
- 4. Organ where blood is oxygenated
- 7. Largest artery
- 9. Connect arteries and veins
- 10. Carry blood back to the heart
- 15. Clear fluid of lymphatic system
