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Invertebrates Crossword

Across
Organs that remove oxygen from water
Members of the arthropod phylum
A group of many individual animals
An organism that lives in or on anther living organism
An animal with a backbone
Animals without a backbone
An invertebrate that eats wood, soil, and animal waste
An invertebrate that produces the thread for silk
Largest group of mollusks
Invertebrates that have stinging cells
Second group of mollusks, includes oysters, clams, and scallops
Down
A flexible ribbon of tiny teeth
Vase-shaped body plan
Feeds on dead or decaying material
An immature form of an animal
Octopuses and squids
Bowl-shape body plan
A group of several different tissues
Invertebrates with soft, unsegmented bodies and a hard outer shell
Basic unit of structure and function