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November 30, 2010

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cc licensed flickr photo shared by oskay

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Physical features

The soft body of a snail is usually protected by a shell. The animal crawls along on a muscular organ called a foot. The muscles in the foot move backwards in a wave-like action. This action moves the snail forwards. Snails have a head with tentacles, or feelers, eyes, a mouth and tiny teeth . All land snails breathe through lungs. Most water-living snails breathe through gills, like fish. Some have lungs and must come to the surface of the water to breathe. The smallest snail is no larger than a pin-head. The largest can grow to 77 centimeters long!

European pulmonate land snail, which has been introduced to many other countries

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