Arthropod definition, any invertebrate of the phylum Arthropoda, having a segmented body, jointed limbs, and usually a chitinous shell that undergoes moltings, including the insects, spiders and other arachnids, crustaceans, and myriapods. Chitin Chitin is a major constituent of the exoskeleton, or external skeleton, of many arthropods such as insects, spiders, and crustaceans. Synonyms for chitinous in Free Thesaurus. Antonyms for chitinous. The hard outer shell of arthropods and insects like beetles is primarily made up of chitin, a naturally occurring biopolymer. This was about 23% of all the recorded Shell's in the USA. In some mollusks, as the cuttlefishes, it is internal, or concealed by the mantle. ) The hard calcareous or chitinous external covering of mollusks, crustaceans, and some other invertebrates. The following BiologyWise article elaborates more on the structure, function, and uses of chitin. The Shell family name was found in the USA, the UK, Canada, and Scotland between 1840 and 1920. Based on amino acid sequences present chitinases are the enzymes that catalyze chitin degradation and divided into Family 18 and 19 of glycosyl hydrolase 1. Exoskeletons made of this durable and firm compound support and protect the delicate soft tissues of these animals, which lack an internal skeleton. Chitin is the main structural component of shells of crustaceans, exoskeleton of insects, fungal cell wall and protozoa. What are synonyms for chitinous? Chitin (C 8 H 13 O 5 N) n (/ ˈ k aɪ t ɪ n / KY-tin) is a long-chain polymer of N-acetylglucosamine, a derivative of glucose.This polysaccharide is a primary component of cell walls in fungi, the exoskeletons of arthropods, such as crustaceans and insects, the radulae of molluscs, cephalopod beaks, and the scales of fish and skin of lissamphibians. Chitin is a large, structural polysaccharide made from chains of modified glucose. 3 words related to chitin: glucosamine, polyose, polysaccharide. Also, the hard covering of some vertebrates, as the armadillo, the tortoise, and the like. The annual worldwide turnover of chitin is around 100 billion tons 2. Pennsylvania had the highest population of Shell families in 1840. Nautilus Shell Meaning in Jewelry by Norma K on Oct 05, 2018 4 comments The chambered nautilus is an ancient creature related to squids and octopuses and … The intrinsic viscosities of the resulting chitin were determined and the intrinsic viscosities of the chitin from the different shrimp shell samples are shown in Table 3 together with their estimated molecular weights, as determined from the MHS-equation using K … Chiton definition is - any of a class (Polyplacophora) of elongated bilaterally symmetrical marine mollusks with a dorsal shell of calcareous plates. 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