Term

mollusk

Definition

a member of phylum Mollusca

Term

mollusk structure

Definition

have 3 germ layers; exhibit cephalization and bilateral symmetry; all have digestive, circulatory, nervous, and respiratory systems some have a nervous system composed of ganglia; aquatic use gills to breathe; aquatic also circulate water through two siphons

Term

radula

Definition

platelike structure near the mouth of many mollusks; bears many tiny teeth used for scraping up food into the animal's mouth