Marine Animals

2. any so-called cold-blooded animal
3. a single individual has both male and female reproductive organs at some point in life
4. one of two principal body types occurring in members of the invertebrate animal phylum Cnidaria
5. a system of canals in echinoderms containing a circulating watery fluid that is used for the movement of the tentacles and tube feet.
7. a body plan in which the body can be divided into mirror images along a central axis
8. having disproportionate arrangement of parts
9. A type of connective tissue that is firm and flexible and having an extracellular matrix comprised mainly of chondroitin sulphate
13. located in the body cavity and is derived from an outpocketing of the digestive tube
15. one of two principal body forms occurring in members of the animal phylum Cnidaria
16. any member of the mammalian group characterized by the presence of a placenta
18. an organism must produce its own body heat through metabolism
20. a skeleton that consists of hard, mineralized structures located within the soft tissue of organisms

1. Animals that lack backbones
4. the shedding or casting off of an outer layer or covering and the formation of its replacement.
6. vertebrates that live in marine environments
10. An air-breathing egg characterized by a shell and extraembryonic membranes.
11. an external anatomical feature that supports and protects an animal's body
12. epidermal organs derived from modified sweat glands.
14. the regular arrangement of body parts around a central axis
17. the formation of an outgrowth (bud) from an organism.
19. hose marine ecosystems consisting of organisms living on, attached to, or burrowing in the sediment of the ocean floor.