Across
- 1. bones that connect your pelvis to your skull
- 4. bone marrow makes ________ cells which help fight disease
- 7. muscles __________ or get shorter to help you move
- 8. the ___________ protects your brain
- 9. muscles help you __________ your body
Down
- 2. muscles ___________ your organs
- 3. inside hollow bones is ___________ ____________
- 5. your ____________ protects your heart and lungs
- 6. __________ and muscles work together to protect organs