Human Circulatory System

1234567891011121314151617181920
Across
  1. 5. Molecules released by WBC to kill bacteria
  2. 7. Center of the circulatory system
  3. 9. Related to carrying blood to and from lungs
  4. 10. Activity that increase heart rate significantly
  5. 12. Carry blood to the heart
  6. 14. Movement of cardiac muscle to pump
  7. 15. Mostly liquid
  8. 16. Kill microorganisms
  9. 18. You can feel this when you touch your wrist
  10. 19. Receive blood
  11. 20. Pump blood
Down
  1. 1. Open and close as blood pass
  2. 2. Present abundantly in blood
  3. 3. Carry blood to the body
  4. 4. Part of the heart with deoxygenated blood
  5. 5. Largest artery
  6. 6. The way oxygen enters cell
  7. 8. The bridge between the two blood vessels
  8. 11. Part of heart with the thickest muscle
  9. 13. Prevent prolong bleeding
  10. 17. A protein that bind oxygen