Across
- 3. makes up the exoskeleton of anthropods.
- 5. snails, oysters, octopuses, nudibranchs.
- 7. animals that have major organs suspended in a fluid-filled cavity completely surrounded by mesoderm.
- 8. attaches bones to muscles.
- 13. specialized layer of epidermal cells.
- 14. Different morphological patterns of embryonic development.
- 15. earthworms, polychaetes, beach tube worms, leeches.
- 16. sea stars, sea urchins, sand dollars, sea cucumbers.
- 17. secreted by the mantle.
Down
- 1. Jellyfish, sea jellies, hydra, corals, sea anemones
- 2. Barrel sponges, boring sponges, basket sponges, vase sponges.
- 3. Mammals, fish, reptiles, bidrs, amphibians.
- 4. cartilaginous rod that forms on the dorsal side of the gut in the embryo.
- 6. derive their energy by organic molecules made by other organisms.
- 8. constituted by cells with similar structure and function.
- 9. Ascaris, pinworms, hookworms, Filaria.
- 10. stress-resistant aggregates of amoebocytes released in asexual reproduction of sponges.
- 11. most diverse and abundant phylum of animals (2 to 10 million species).
- 12. symmetry with distinct anterior and posterior ends.
- 15. Characterized as eukaryotic, multicellular and ingestive-feeding heterotrophs.
