HEART, CIRCULATION AND BLOOD

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Across
  1. 7. red blood cell
  2. 8. fluid tissue found in open circulatory systems
  3. 11. liquid component of blood
  4. 13. blood with a lower oxygen content
  5. 14. vessels in open circulatory systems
  6. 15. organ which pumps blood or haemolymph
  7. 16. blood with a higher oxygen content
  8. 17. cell fragment in blood needed for clotting
  9. 18. large vessel returning blood to the heart
Down
  1. 1. areas where lymphatic vessels meet contain many white blood cells
  2. 2. vessels in closed circulatory systems
  3. 3. area around cells in tissues
  4. 4. large vessel taking blood away from the heart
  5. 5. fluid tissue found in closed circulatory systems
  6. 6. white blood cell
  7. 9. structures which control the direction of blood flow
  8. 10. molecule which transports oxygen around animals
  9. 12. fluid in the system which returns fluid from tissues to blood vessels