The Circulatory System CROSSWORD PUZZLE

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Across
  1. 1. VESSELS- Network of tubes that carry blood
  2. 3. DIOXIDE- Gas removed from the body
  3. 5. Blood vessels that carry blood back to the heart
  4. 7. BLOOD CELLS- Cells that help fight infection
  5. 9. Upper chambers of the heart
  6. 11. BLOOD CELLS- Cells that carry oxygen
  7. 12. Small cells that help blood clot
  8. 13. Structures that prevent backflow of blood
  9. 15. The flow of blood around the body
  10. 16. The liquid part of blood
Down
  1. 1. The fluid that carries oxygen and nutrients
  2. 2. Tiny blood vessels where exchange of substances occurs
  3. 4. Organ that oxygenates blood
  4. 5. Lower chambers of the heart
  5. 6. The main organ that pumps blood
  6. 8. Gas carried by red blood cells
  7. 10. Blood vessels that carry oxygen-rich blood away from the heart
  8. 14. The beating of the heart felt in arteries