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Mollusks (Characteristics of Mollusks (Body Structure (bilateral symmetry,…
Mollusks
Snails and Slugs
The 3 major groups of mollusks are gastropods, bivalves, and cephalopods
snails
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what they eat
Land snails enjoy plants, fungi and algae. They naturally congregate in fields and grassy areas. Provide a land snail with plant matter and vegetables such as lettuce, dandelion greens, cucumbers and carrots
how they move
Land snails move by gliding along on their muscular foot, which is lubricated with mucus and covered with epithelial cilia. This motion is powered by succeeding waves of muscular contractions that move down the ventral of the foot
how snails reproduce
Snails reproduce the same way almost everything else does - they mate and lay eggs. Some snails are hermaphrodites, though (have both male and female sexual organs in the same individual), which means that two snails can fertilize each-other
slugs
slugs eat with a jaw and a flexible band of thousands of microscopic teeth, called a radula. The radula scrapes up, or rasps, food particles and the jaw cuts off larger pieces of food, like a leaf, to be rasped by the radula
Foot The bottom side of a slug, which is flat, is called the 'foot'. Like almost all gastropods, a slug moves by rhythmic waves of muscular contraction on the underside of its foot.
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Two-shelled Mollusks
Bivalves include oysters, clams, scallops, and mussels
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