The Circulatory System

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Across
  1. 3. Blood vessel with a thick wall
  2. 4. Number of chambers in the heart
  3. 7. Transported around the body by red blood cells
  4. 8. Produced by some white blood cells
  5. 12. Prevent backflow
  6. 13. Gives red blood cells their colour
  7. 14. Plasma carries _________ around the body
  8. 16. Responsible for clotting
  9. 18. Blood vessel with a thin wall
Down
  1. 1. Lower chambers of the heart
  2. 2. Enters blood as it cycles around the body, exits in the lungs
  3. 5. Thicker side of the heart
  4. 6. White blood cells ______ invading microorganisms
  5. 9. A group of cells with a similar structure and a specific function
  6. 10. Blood vessel that is one cell thick
  7. 11. Large blood vessel that carries blood away from the heart
  8. 15. The heart is a type of ______
  9. 16. Place fingers on wrist to measure this
  10. 17. Plasma is the ______ part of blood