Across
- 2. Primary body cavity.
- 6. Strap-like organ used to scrape up food.
- 7. Having three germ layers.
- 9. Filter feeders that use ciliated gills to trap particles.
Down
- 1. Symmetry where most have a clear left and right side.
- 3. Group of intelligent invertebrates including octopuses.
- 4. Development where the blastopore becomes the mouth.
- 5. Fold of tissue that drapes over the visceral mass.
- 8. Group that includes land snails and sea slugs.