Across
- 2. An animal that uses the environment for body heat.
- 3. An organism that has male and female reproductive organs.
- 4. The bell-shaped, swimming body form of a cnidarian.
- 5. A network of tubes used by sea stars to move and feed.
- 7. A body plan where the left and right sides look very alike.
- 8. A body plan with no specific shape or balance.
- 9. A tissue that makes up the skeletons of sharks and rays.
- 13. A gas-filled bag that helps a fish float at different depths.
- 15. The tube-shaped, still body form of a cnidarian.
- 16. An organ that provides oxygen and food to a developing baby.
- 18. An animal that can create its own body heat internally.
- 20. An internal skeleton inside the body.
Down
- 1. An animal with no backbone.
- 4. Shedding an old exoskeleton to grow a larger one.
- 6. An animal that has a backbone.
- 10. Eggs with a waterproof shell that allow reptiles and birds to breed on land.
- 11. A hard outer shell that protects and supports an animal's body.
- 12. Special organs in mammals that produce milk.
- 14. A body plan where parts are arranged around a central point, like a wheel.
- 17. A asexual reproduction where a new animal grows off the side of the parent.
- 19. Organisms that live on the bottom of the ocean.