The Skeletal System --> Bones

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Across
  1. 2. This protects the brain
  2. 3. This is can be also be called 'knee caps'
  3. 6. Your toes
  4. 8. The biggest bone in your leg
Down
  1. 1. This makes you laugh and is located on the arm
  2. 4. This expands for girls
  3. 5. Your chinny-chin-chin
  4. 7. This protects the lungs