Across
- 3. Used to reduce friction between bones
- 5. The spider family
- 7. How plants respirate
- 10. Something that does not let something through it
- 11. The starters of the food chain
- 13. Used to move the skeleton
Down
- 1. Split light
- 2. Used to catch dirt and mucus in the throat
- 3. Something that lets things through it
- 4. Used to break down food
- 6. Needed for photosynthesis to happen
- 8. 400 meters per second
- 9. The change between child and adult
- 12. The name of a partially developed baby