endoskeleton		Organism that breaks down wastes and dead organisms.
abdomen		A plant is one.
antenna		Octopus, squid or nautilus.
biologicalcontrol		Where an insect's wings and legs are attached.
pollinator		Resembles the adult, but has no wings.
arthropod		Clam, oyster, or scallop.
ecology		Animal that eats both plants and animals.
consumer		Process of shedding an outgrown exoskeleton
mollusk		Animal that eats only other animals.
radula		Process in which an animal's body undergoes dramatic changes in form during its life span.
carnivore		Animal that eats only plants.
crustacean		Type of metamorphosis in which an egg hatches into a nymph before becoming an adult.
cephalopod		Study of how organisms interact with their environment.
echinoderm		Organism that obtains energy by feeding on other organisms.
exoskeleton		Arthropod with two body sections, four pairs of legs, and no antenna.
pesticide		Sea star, sea cucumber, or sea urchin.
watervascularsystem		Metamorphosis in which the animal goes through four dramatically different phases.
foodchain		Appendage on the head of an animal that contains sense organs.
gradual		It's name means "jointed legs".
omnivore		An internal skeleton.
arachnid		Hind section of an arthropod's body that contains some organs.
thorax		Series of events in which one organism eats another in order to obtain energy.
bivalve		Stage in which an insect changes from a larva into an adult.
nymph		Organ that removes oxygen from water.
gastropod		Arthropod with three body sections, three pairs of legs, one pair of antennae and usually one or two pairs of wings.
insect		System of fluid-filled tubes in an echinoderm's body.
opencirculatorysystem		Waxy, waterproof outer shell that protects an invertebrate.
tubefeet		Arthropod that has two or threee body sections, five or more pairs of legs, and two pair of antennae.
complete		Mollusk with a single shell or no shell at all.
herbivore		Help an echinoderm in movement and obtaining food.
pupa		When the heart pumps blood into open spaces in the body and is not confined to blood vessels.
metamorphosis		Invertebrate with a soft, unsegmented body - most have a hard shell.
gill		A natural predator released to combat an insect pest.
decomposer		Chemical designed to kill a pest animal.
producer		Flexible ribbon of tiny teeth in mollusks.
molting		Birds, bees, wind, rain and sometimes other animals.