Radula
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The radula is an anatomical structure found in most mollusks, serving as their primary feeding tool. Often compared to a tongue, this minutely toothed, chitinous ribbon typically functions by scraping
Radula and individual tooth of the predatory ghost slug, Selenochlamys ysbryda
Microscopic detail of a docoglossan radula showing the denticles or teeth
Tracks made by terrestrial gastropods with their radulas, scraping green algae from a surface inside a greenhouse
Upper right: Mouth of a Planorbarius corneus freshwater snail with the radula visible.
Chitin
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Chitin n is a long-chain polymer of N-acetylglucosamine, an amide derivative of glucose. Chitin is the second most abundant polysaccharide in nature; an estimated 1 billion tons of chitin are produced
Radula
…radulas) is an anatomical structure found in most mollusks, serving as their primary feeding tool. Often compared to a tongue, this minutely toothed, chitinous ribbon typically functions by scraping or cutting food before it enters the esophagus. Mollusks in every class possess a radula, except for bivalves…
A close-up of the wing of a leafhopper; the wing is composed of chitin.
A cicada emerges from its nymphal exoskeleton; the shed exoskeleton is mostly modified chitin (sclerotin) but the wings and much of the adult body are still unsclerotized chitin at this stage