Across
- 2. Cold-blooded relying on the environment (like the sun) to regulate body temperature
- 3. An individual that has both male and female reproductive organs
- 4. A bowl-shaped body form that swims freely (like a jellyfish)
- 5. A system of fluid-filled tubes used by echinoderms (like starfish) to move and feed
- 7. A body plan that can be divided into two matching left and right halves
- 8. A body shape that cannot be divided into equal halves (no pattern)
- 9. A tough, flexible tissue that is softer than bone
- 13. An internal gas-filled organ that helps fish stay buoyant at different depths
- 15. A tube-shaped body form that stays attached to one spot (like a sea anemone)
- 16. An organ that connects a developing fetus to the mother to provide nutrients and oxygen
- 18. Warm-blooded able to maintain a constant body temperature internally
- 20. An internal skeleton or support structure inside the body.
Down
- 1. An animal without a backbone
- 4. To shed an old outer layer (like a shell or skin) to make room for a new one
- 6. An animal that has a backbone
- 10. Eggs with a waterproof shell and membranes that allow embryos to develop on land
- 11. A hard outer shell that protects and supports an animal’s body
- 12. Organs in female mammals that produce milk to feed their young
- 14. A body plan where parts are arranged around a central point, like a wheel
- 17. A type of reproduction where a new organism grows directly out of the parent’s body
- 19. Relating to the very bottom of a body of water (ocean or lake floor)