Across
- 2. Superclass of four-limbed vertebrates.
- 5. Paired lateral appendages in polychaete annelids.
- 6. A flexible, rod-shaped body found in embryos of all chordates.
- 7. Phylum of simple, sessile animals with porous bodies.
- 9. Flagellated cell in sponges
- 11. Large opening in sponges for water exit.
- 14. Internal skeleton or supporting framework in an animal.
- 15. Symmetry typical of animals like starfish.
- 19. Free-swimming life stage in some cnidarians.
- 20. General term for fishes.
- 21. Central cavity in sponges
- 22. Animals with three germ layers
Down
- 1. Cavity serving both digestive and circulatory purposes in cnidarians.
- 3. Subphyla Urochordata and Cephalochordata are referred to as
- 4. A bony flap covering the gills in bony fishes.
- 8. Excretory organs in annelids.
- 10. Stinging cells found in cnidarians.
- 12. Segmentation of the body in some animals.
- 13. Animals that maintain a constant body temperature.
- 16. Class of vertebrates that includes birds
- 17. Sessile, tubular stage in the life cycle of cnidarians.
- 18. Body cavity present in coelomates