Across
- 2. Controls our nervous system.
- 6. The smallest unit of the nervous system.
- 8. They protect the organs of our bodies.
Down
- 1. Connect arteries and veins.
- 3. Whitish fibers of connective tissue that attach skeletal muscles to bones.
- 4. Contains and digests food.
- 5. Remove the carbon dioxide from the blood and refill it with oxygen.
- 7. Protects the heart and lungs.