Body Systems

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Across
  1. 2. bones that protect your lungs
  2. 3. the muscle that pumps out all the blood
  3. 5. the gas you breathe in
  4. 8. the muscle used to Straighten you elbow
  5. 10. the bone in your upper arm
  6. 12. the bone in your thigh
Down
  1. 1. the gas you breath out
  2. 4. the muscle used to go on your tiptoes
  3. 6. the muscle used to smile
  4. 7. the things you can see on your wrists
  5. 9. the bone that protects your brain
  6. 11. the muscle used to walk on heels