Marine Animals

3. Bladder located in the body cavity and is derived from an outpocketing of the digestive tube
9. Animals that lack backbones
10. Symmetry a body plan in which the body can be divided into mirror images along a central axis
11. having disproportionate arrangement of parts
15. one of two principal body types occurring in members of the invertebrate animal phylum Cnidaria
20. an organism must produce its own body heat through metabolism
21. a skeleton that consists of hard, mineralized structures located within the soft tissue of organisms

1. A type of connective tissue that is firm and flexible and having an extracellular matrix comprised mainly of chondroitin sulphate
2. Eggs An air-breathing egg characterized by a shell and extraembryonic membranes.
4. vertebrates that live in marine environments
5. Vascular System a system of canals in echinoderms containing a circulating watery fluid that is used for the movement of the tentacles and tube feet.
6. a single individual has both male and female reproductive organs at some point in life
7. any so-called cold-blooded animal
8. the shedding or casting off of an outer layer or covering and the formation of its replacement.
12. Glands epidermal organs derived from modified sweat glands.
13. any member of the mammalian group characterized by the presence of a placenta
14. the formation of an outgrowth (bud) from an organism.
16. an external anatomical feature that supports and protects an animal's body
17. hose marine ecosystems consisting of organisms living on, attached to, or burrowing in the sediment of the ocean floor.
18. Symmetry the regular arrangement of body parts around a central axis
19. one of two principal body forms occurring in members of the animal phylum Cnidaria