Across
- 4. is caused by the lack of vitamin D
- 5. process that the excretory system does to eliminates waste
- 7. is the biggest bone in our body
- 8. is a micro-organism that causes diseases
Down
- 1. is the stongest muscle in the body
- 2. the respiratory system takes in... and eliminates carbon dioxide
- 3. this organ filter the waste from the blood before the blood returns to the heart
- 6. the basic unit of nervous system
- 9. is the biggest artery in the body