Cardiovascular System

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Across
  1. 1. Lower chambers of the heart
  2. 3. Tubes through which blood circulates
  3. 4. Cell fragments aiding in blood clotting
  4. 5. Red fluid circulating in the body
  5. 7. Carry blood away from the heart
  6. 9. Tiny vessels connecting arteries and veins
  7. 11. Carry blood towards the heart
Down
  1. 2. Recording of the heart's electrical activity
  2. 6. Liquid component of blood
  3. 8. Divides the heart into left and right sides
  4. 10. White blood cells