EARTHWORM

3. A long, soft-bodied animal that lives in soil and helps improve soil quality.
4. The group of segmented worms to which earthworms belong.
8. A muscular organ that grinds food into smaller pieces.
9. The repeated ring-like divisions that make up an earthworm's body.
10. Body structures that contract and relax to produce movement.
12. Clusters of nerve cells that help coordinate the earthworm's activities.

1. An organism that has both male and female reproductive organs.
2. Excretory structures that remove metabolic wastes from the body.
5. The outer layer of cells that covers the earthworm's body
6. The organ where most digestion and nutrient absorption occur.
7. A thickened, ring-like body structure involved in reproduction.
11. Tiny bristle-like structures that help an earthworm move through the soil.