Phylum Mollusca Study Guide

Know…

Mollusca

Head-food

Visceral Mass

Mantle

Mantle Cavity

Coelom

Radula

Gastropoda

Shell

Torsion

Operculum

Bivalvia

Adductor Muscles

Siphon

Valves

Umbo

Incurrent Opening

Excurrent Opening

Gills

Cephalopoda

Tentacles

Cuttlebone

Pen

Jet-Propulsion

Beak

Chromatophores

Ink Sac

Spermatophores

Polyplacophora

Scaphopoda

Monoplacophora

Aplacophora

Understand…

The basic characteristics of ALL mollusks.

The characteristics of each major mollusk class (Gastropoda, Bivalvia, Cephalopoda).

The defining characteristics of each minor mollusk class (Scaphopoda, Polyplacophora, Monoplacophora, Aplacophora).

The three main regions of the molluscan body.

The functions of each major structure found within the molluscan body.

The purpose and benefit of torsion in gastropods.

How gas exchange, circulation and feeding occurs in each of the major molluscan classes.

Be Able To…

Identify what each mollusk class means (ex: Gastropoda = “Stomach foot”).

Compare and contrast Class Cephalopoda with the other molluscan classes.

List which classes of mollusks have external shells, internal shells, or no shells.

Describe how cephalopods are able to move.

Identify examples of animals from each molluscan class – major and minor.

Identify the internal and external structures (and their function!) of the squid anatomy.

Identify and label the internal and external structures of the snail and clam from the diagrams given out in class.

Study Tools:

Powerpoint, Notes Organizer, Mollusk Review Sheet, Crossword Puzzle, Snail and Clam Diagrams, Squid Packet, Ch. 12