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The radula (US: / ˈ r æ dʒ ʊ l ə /; pl.: radulae or radulas) [1] is an anatomical structure used by mollusks for feeding, sometimes compared to a tongue. [2] It is a minutely toothed, chitinous ribbon, which is typically used for scraping or cutting food before the food enters the esophagus .
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The buccal mass is the first part of the digestive system, and consists of the mouth and pharynx. The mouth includes a radula, and in most cases, also a pair of jaws. The pharynx can be very large, especially in carnivorous species. Many carnivorous species have developed a proboscis, containing the oral cavity, radula, and part of the ...
Radula has many similar teeth per row (but this is modified in Rathousiidae). There is a common spermoviduct, but then the male and female tracts divide and the male and female parts have widely separated openings. A free-swiming veliger larva is found in marine species of Ochidiidae, otherwise the development is direct. [27] [24] [28]
Each specialized cone snail tooth is stored in the radula sac, except for the tooth that is in current use. [13] The radula tooth is hollow and barbed, and is attached to the tip of the radula in the radular sac, inside the snail's throat. When the snail detects a prey animal nearby, it extends a long flexible tube called a proboscis towards ...
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