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  2. Chitin - Wikipedia

    en.wikipedia.org/wiki/Chitin

    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, an amide derivative of glucose. Chitin is the second most abundant polysaccharide in nature (behind only cellulose); an estimated 1 billion tons of chitin are produced each year in the biosphere. [1]

  3. Arthropod exoskeleton - Wikipedia

    en.wikipedia.org/wiki/Arthropod_exoskeleton

    Arthropod cuticle is a biological composite material, consisting of two main portions: fibrous chains of alpha-chitin within a matrix of silk-like and globular proteins, of which the best-known is the rubbery protein called resilin. The relative abundance of these two main components varies from approximately 50/50 to 80/20 chitin protein, with ...

  4. File:Chitin glucose and cellulose.svg - Wikipedia

    en.wikipedia.org/wiki/File:Chitin_glucose_and...

    English: 1.The transition between glucose and N-Acetylglucosamine 2. The polymerization of N-Acetylglucosamine to chitin 3.The polymerization of glucose to cellulose. Glucose changes depending on what form it takes, glucose is the basis of both chitin and cellulose and the only difference between the two types is what form glucose takes in each pol

  5. File:Chitin.svg - Wikipedia

    en.wikipedia.org/wiki/File:Chitin.svg

    The following other wikis use this file: Usage on ar.wikipedia.org كايتين; استخدام أسيتات الكايتين لالتقاط غاز ثاني أكسيد الكربون والحد من التلوث

  6. Composition of the human body - Wikipedia

    en.wikipedia.org/wiki/Composition_of_the_human_body

    Parts-per-million cube of relative abundance by mass of elements in an average adult human body down to 1 ppm. About 99% of the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Only about 0.85% is composed of another five elements: potassium, sulfur, sodium, chlorine, and magnesium ...

  7. Insect morphology - Wikipedia

    en.wikipedia.org/wiki/Insect_morphology

    Insects, like all arthropods, have no interior skeleton; instead, they have an exoskeleton, a hard outer layer made mostly of chitin that protects and supports the body. . The insect body is divided into three parts: the head, thorax, and abdomen

  8. Mollusc shell - Wikipedia

    en.wikipedia.org/wiki/Mollusc_shell

    However, a growing body of molecular and biological data indicate that at least certain shell features have evolved many times, independently. [40] The nacreous layer of shells is a complex structure, but rather than being difficult to evolve, it has in fact arisen many times convergently. [ 40 ]

  9. Chitinase - Wikipedia

    en.wikipedia.org/wiki/Chitinase

    Like cellulose, chitin is an abundant biopolymer that is relatively resistant to degradation. [17] Many mammals can digest chitin and the specific chitinase levels in vertebrate species are adapted to their feeding behaviours. [18] Certain fish are able to digest chitin. [19] Chitinases have been isolated from the stomachs of mammals, including ...