Across
- 2. It sends messages to the body.
- 4. It protects your nerves and supports your body.
- 5. It connects your foot to your leg.
- 7. They extract nutrients and water from food.
Down
- 1. Curved bones articulated in pairs to the spine that protect organs.
- 2. Only humans sleep on it while animals sleep on their sides or stomachs.
- 3. Thanks to this organ, the blood in your veins travels approximately 19.000 kilometres a day.
- 6. They belong to the respiratory system.