9.6 Phylum Mollusca

marine, although some liev in freshwater or on land

mantle- secretes a protective shell around the animals soft unsegmented body. muscular sac covers the body behind the arms and head.

muscular foot used for locomotion

squids, clams, mussels, oysters, snails, slugs,

extends from the collar towards the head.

• female has 2 large nidamental glands that produce coverings for the egg
• ovary- where eggs are produced
• testis covered by the cecum