Across
- 3. Body plan in which only a single, imaginary line can divide the body into two equal parts
- 6. Marine annelids move with the help of these
- 7. Class that includes squid, octopuses and nautiluses
- 12. Organ of terrestrial annelids that helps in reproduction
- 13. A group of invertebrates including earthworms and leeches
- 14. Invertebrates don't have this system, but we do!
- 15. Most invertebrates undergo this process to convert into adults
- 21. Body plan in which body parts repeat around the center of the body
- 22. Not the biggest but the most intelligent of all invertebrates
- 23. Phylum in which sponges belong to
- 24. Skeleton of a sponge is made of these
- 25. A group pf invertebrates including 80% of animal species
Down
- 1. Molluscs with divided shell and no head
- 2. Phylum which coral, jellyfish and sea anemone belong
- 4. Annelids have long tube-like body with many...
- 5. Free swimming cnidarian that is an umbrella like shape with hanging tentacles
- 8. A large opening on a sponge through which filtered water is expelled
- 9. One of two body of a Cnidarian
- 10. Most simple of all animals
- 11. Hole through which water enters and leaves a sponge
- 16. Bivalves lack this
- 17. Soft body invertebrates with an external shell
- 18. Nematodes have round body, simple systems and many are...
- 19. Class that includes sea snails and sea slugs
- 20. Long, soft and skinny animal with no legs (in general)