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For upcoming scince test
Invertebrates with soft, unsegmented bodies that are often protected by a hard outer shell
Open circulatory system
The blood is not always inside the blood vessels
Organs that remove oxygen from the water
The largest group of mollusks
Animals that eat only plants
Animals that only eat other animals
A flexible ribbon of tiny teeth, to obtain food
Mollusks that have two shells held together by hinges and strong muscles
Animals that eat both plants and animals
An ocean-dwelling mollusk whose foot is adapted to form tentacles around its mouth