the Heart

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Across
  1. 7. brings blood back from the lungs
  2. 9. pumps blood to the lungs
Down
  1. 1. has the thickest walls
  2. 2. fills the heart with blood
  3. 3. pumps blood out of the heart
  4. 4. the large bone between the knee and your hip
  5. 5. the cage like bones that protect your upper organs
  6. 6. it pumps blood to the rest of the body
  7. 8. has the thinnest walls