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30 Cards in this Set

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arthropod
invertebrate with jointed legs and a hard exoskeleton
coelenterate
invertebrate with stinging tentacles
echinoderm
invertebrate with spiny skin
invertebrate
animal with no notochord or backbone
mollusk
invertebrate with a soft body and usually a shell
sponge
invertebrate that has a body filled with holes and that cannot move about on its own
worm
invertebrate with a long, narrow body; may be flat, round, or segmented
collar cells
cells in a sponge that trap tiny plants and animals for food
flagellum
long, threadlike structure
budding
method of reproduction in which a small organism grows on the larger organism, then breaks away
medusa
jellyfish
polyp
small coelenterate with its closed end attached to a rock
radial symmetry
arrangement of parts in a circle around a center point
reef
large structure made of the skeletons of corals
tentacle
long, armlike structure on a coelenterate
flatworm
worm with a flat body; most simple worm
parasite
organism that lives on and benefits from another animal withou benefiting that animal in any way
roundworm
worm with a long, thin, round body
segmented worm
worm with a segmented body; the most complex worm
bivalve
mollusk that has a shell with two hinged halves
cephalopod
mollusk with a large head and a foot divided into tentacles
gastropod
mollusk with a single shell and one or two sets of tentacles
mantle
stucture in mollusks that covers the body and often makes a shell
radula
ribbonlike tongue with many small, sharp teeth
siphons
long tubes in bivalves that take in food and water and get rid of waste
tube feet
tiny tubelike structures in echinoderms that help them move, gather food, feel, and breathe
arachnid
arthropod with no wings, four pairs of legs, no antennae, and two body parts
bilateral symmetry
arrangement of body parts so left and right sides are mirror images
chitin
hard material that makes up the exoskeleton of arthropods
crustacean
arthropod with more than three pairs of legs and most often two pairs of antennae