Crossword

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Across
  1. 4. fluid portion of blood
  2. 9. a large vessel that carries deoxygenated blood to the right atrium
  3. 11. a wall that separates the heart int right and left side
  4. 12. a large blood vessel which carries blood away from the heart to be distributed to all parts of body
Down
  1. 1. the lower chamber of the heart
  2. 2. microscopic blood vessels which connects arteries to veins
  3. 3. blood vessels which carry blood to the heart
  4. 5. a valve between left atrium and left ventricle
  5. 6. a protein found in red blood cells that transport oxygen
  6. 7. blood is pumped from the heart to the lungs via ... artery
  7. 8. a substance that can block arteries
  8. 10. a blood vessel which carries blood away from the heart