Snails
Snails are the common name for gastropod mollusks (lat. Gastropoda), which have an outer shell.
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Snails are distributed throughout the world. The greatest number of species lives in the coastal zone of tropical and subtropical seas.
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In the body of the snail, a head, a leg and an visceral sac are distinguished, from which the mantle fold extends.
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Small snails are able to move due to the beating of cilia.
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In addition, the epithelium of the leg secretes a large amount of mucus, which contributes to a better glide over the surface of the substrate.
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Snails move on the lower surface of the leg (sole), driving along its wavelength of muscle contractions.