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The teeth of the radula are lubricated by the mucus of the salivary gland, just above the radula. Food particles are trapped into this sticky mucus, smoothing the progress of food into the esophagus. Certain gastropods use their radular teeth to hunt other gastropods and bivalve mollusks, scraping away the soft parts for ingestion.
The radula in this species is longer than the shell itself. It contains 1,920 teeth in 160 rows of 12 teeth each. Patella vulgata is found attached to firm substrates from the high shore to the edge of the sublittoral zone, although it predominates in areas of wave action. Its shell is conical, up to around 6 cm long, and lacks defined chirality.
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 ...
Radula typically has many similar teeth per row. The structure of the genital tract varies widely, from Pythia with a common spermoviduct leading to a single genital opening from which an external groove leads to the separate vas deferens and penis, to Leucopythia with female and male tracts separate from the carrefour and with two openings.
The radula comprises a chitinous ribbon with teeth arranged in transverse and longitudinal rows. [13] The radula continually renews itself during the entire lifespan of a mollusk. The teeth and membrane are continuously synthesized in the radular sac and then shifted forward towards the working zone of the radula.
Diverticulum – A pouch or hole, as the pouch containing the radula, or that containing the dart in helices. [1] Dormant – In a state of torpor or sleep. [1] Dorsal – The back. In gastropods the opposite to the aperture. [1] Ectocone – The outer cusp on the teeth of the radula. [1] Edentulous – Without teeth or folds, as the aperture ...
The radula has the rhachidian and 4 to 5 lateral teeth with irregularly oval body, and rather long, pointed cusps, their outer edges serrate. The inner marginal teeth are enlarged. The pseudo-proboscis of the animal is well developed [2] [3]
The radula has a dental formula of [many].1.4.1.4.1.[many], [3] with a wide, rectangular, acuspate rachidian tooth. [4] The various genera have a few dozen rows of teeth. [ 3 ]