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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 .
English: Clockwise: Tentacle, mouth (with radula) and eggs of ... Tentacle, mouth (with radula) and eggs of Planorbarius corneus freshwater snails. Items portrayed in ...
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 ...
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 ...
Tympanotonus radula (Linnaeus, 1758) (junior synonym; misspelled genus) Tympanotonos fuscatus , the West African mud creeper , is a species of snail living in brackish water , a gastropod mollusk in the family Potamididae .
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The radula is taenioglossate, consisting of seven teeth per row: one middle tooth, flanked on each side by one lateral and two marginal teeth. The radula is used to scrape algae and detritus. Phlorotannins in the brown algae Fucus vesiculosus and Ascophyllum nodosum act as chemical defenses against L. littorea. [19]