Animal Crossword

2. "cold-blooded" animal, is one that cannot regulate its own body temperature.
3. Organisms that have both kinds of reproductive organs.
4. Form of cnidarian which the body is shaped like an umbrella.
5. Hydraulically controlled system consisting of a circumoral ring around the esophagus with connecting radial canals each leading to an ambulacrum. The radial canals in crinoids run along each arm into an ambulacral groove and tube feet.
7. The Property of being divisible into symmetrical halves on either side of a unique plane.
8. Lack of symmetry.
9. A type of connective tissue that is firm and flexible and has an extracellular matrix comprised mainly of chondroitin sulfate.
13. A flexible-walled, gas-filled sac located in the dorsal portion of the body cavity. It controls the fish's buoyancy and in some species is important for hearing.
15. One of the two forms found in the phylum Cnidaria.
16. An organ that connects the developing fetus to the uterine wall, thereby allowing nutrient uptake, waste elimination, and gas exchange via the mother's blood supply.
18. Dependent on or capable of the internal generation of heat.
20. An internal skeleton, such as the bony or cartilaginous skeleton of vertebrates.

1. Animal without a backbone.
4. To shed old feathers, hair, or skin, or an old shell, to make way for new growth.
6. Animal with a backbone.
10. Eggs that are encased by extra-embryonic membranes, which allowed animals to evolve into more terrestrial environments.
11. External covering for the body in some invertebrate animals, especially arthropods, provides both support and protection.
12. The milk-producing gland of women or other female mammals.
14. Symmetry around a central axis.
17. Having or developing buds,type of asexual reproduction.
19. Lowest level of a body of water, such as the ocean.