Across
- 2. Open and close as blood pass
- 6. The bridge between the two blood vessels
- 8. Mostly liquid
- 10. A protein that bind oxygen
- 12. Receive blood
- 15. Kill microorganisms
- 17. Present abundantly in blood
- 18. Carry blood to the heart
Down
- 1. Prevent prolong bleeding
- 3. Pump blood
- 4. Movement of cardiac muscle to pump
- 5. Activity that increase heart rate significantly
- 7. Largest artery
- 8. Related to carrying blood to and from lungs
- 9. The way oxygen enters cell
- 11. Molecules released by WBC to kill bacteria
- 13. You can feel this when you touch your wrist
- 14. Center of the pulmonary system
- 16. Carry blood to the body