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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 .
Muscles that control the radula are shown in brown. The surface of the radula ribbon, with numerous teeth, is shown as a zig-zag line. The odontophore is part of the feeding mechanism in molluscs. It is the cartilage which underlies and supports the radula, a ribbon of teeth. [1] The radula is found in every class of molluscs except for the ...
Trochus radula (Parreyss in Philippi 1848) Monodonta radula (Philippi, 1849) Diloma radula is a species of sea snail , a marine gastropod mollusk in the family Trochidae , the top snails.
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 ...
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The monoplacophoran Neopilina uses its radula in the usual fashion, but its diet includes protists such as the xenophyophore Stannophyllum. [45] Sacoglossan sea-slugs suck the sap from algae, using their one-row radula to pierce the cell walls, [46] whereas dorid nudibranchs and some Vetigastropoda feed on sponges [47] [48] and others feed on ...
The beautiful sea snail radula is composed of central teeth with 3 cusps on each side, rectangular lateral teeth with small cusps, and smooth marginal teeth. [2] The operculum of Stellaria Chinensis is thin, flexible, and holds a long and narrow opercular lobe.