Across
- 4. part of the skeletal system is the brain protected by.
- 5. bone in the human body.
Down
- 1. protected by the rib cage.
- 2. of the fish that helps them to move.
- 3. given to the animals with backbone.
- 4. kind of skeleton does a cockroach have.
- 6. of muscles you use to lower your arm.
- 7. of the fish.