The Circulatory System

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Across
  1. 3. Small sacs in the lungs which help oxygen get into the blood
  2. 4. The two tubes the trachea splits into
  3. 5. The vein/artery that leads to/from the lungs
  4. 8. Where blood exits the heart
  5. 10. What blood carries
  6. 11. The organ that pumps blood around the body
Down
  1. 1. Where blood first enters the heart
  2. 2. The small tubes in the lungs
  3. 6. The main artery away from the heart
  4. 7. The organs that supply oxygen to the blood
  5. 8. The main vein back to the heart
  6. 9. Commonly known as the windpipe