Circulatory system

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Across
  1. 3. Outer Membrane enclosing the heart
  2. 5. Another name for a Red Blood Cell
  3. 6. Site for gas exchange
  4. 9. Artery carrying blood from the heart to the lungs for oxygenation
  5. 11. Each of the two lower open areas of the heart
  6. 13. Largest artery in the body
  7. 14. Lining of chambers and valves of the heart
Down
  1. 1. Carries oxygen rich blood to the heart
  2. 2. Another name for a White Blood Cell
  3. 4. A large heart vein that carries blood to the heart from other areas of the body
  4. 7. Blood vessels that carry oxygen rich blood from your lungs to your heart
  5. 8. The upper open areas of the heart from which blood is passed to the ventricles
  6. 10. Middle wall enclosing heart
  7. 12. Carries oxygen poor blood to the heart