Skeletons-and-Muscles

4. The skull protects the brain.

7. The ribs protect the heart and lungs.

10. Your skeleton grows with you.

13. A woodlouse has its skeleton on the outside of its
body.

16. One muscle pulls your arm up, but you use a
different muscle to pull it down.

19. As one muscle contracts the other muscle in the
pair relaxes.

22. Your skeleton grows at the same rate as the rest of
your body.

25. Exoskeletons (a skeleton outside of the body) do
not grow bigger, so these animals have to shed and
grow a new one.

26. THE END