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