In general, among Mollusks, the mouth opens into a buccal cavity. In most classes of Mollusks, the buccal cavity contains a tongue called the odontophore. The odontophore possess multiple rows of teeth called radula that chitonous and flexible. Among Mollusks the number of teeth can range from a few to over 100,000. The size, . . . → Read More: On How Mollusks are Cooler Than Echinoderms (or anything else) Pt. 3: The Radula