Animal Crossword

3. A network of water-filled canals in echinoderms for movement and feeding.
4. The sessile, cylindrical form of a cnidarian.
5. An animal with a backbone.
7. A type of asexual reproduction where a new organism grows from the parent.
10. An internal skeleton, characteristic of vertebrates.
11. An organism with both male and female reproductive organs.
12. ggs that contain a protective membrane and fluid, allowing land animals to reproduce away from water.
13. Referring to organisms that live on the ocean floor.
14. Symmetry around a central axis, typical of organisms like jellyfish.
16. Organisms that depend on external sources of heat to regulate their body temperature (cold-blooded).
17. The shedding of an exoskeleton or outer layer to grow.
18. The free-swimming, bell-shaped form of a cnidarian.
19. Organisms that generate their own heat to maintain body temperature (warm-blooded).

1. A hard outer structure that provides support and protection.
2. Glands in female mammals that produce milk for their young.
4. An organ that connects the developing fetus to the uterine wall for nutrient exchange in mammals.
6. Symmetry where the body can be divided into two equal halves.
8. An animal without a backbone.
9. A lack of symmetry in body structure.
15. An organ in fish used for buoyancy control.
20. A flexible tissue found in joints and some animal skeletons.