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Skeleton - A hard anatomical structure that forms part of the body of animals. The skeleton can be made of organic, inorganic substances as well as a combination of both types of substances. The vertebrate skele (6×6)

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Skeleton - A hard anatomical structure that forms part of the body of animals. The skeleton can be made of organic, inorganic substances as well as a combination of both types of substances. The vertebrate skele (6×6)

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A hard anatomical structure that forms part of the body of animals. The skeleton can be made of organic, inorganic substances as well as a combination of both types of substances. The vertebrate skeleton is made of bones (various proteins and mineral salts, e.g. hydroxyapatite) and cartilage (mainly proteins) and various horny products (keratin). Also in cephalopods there is an internal cartilage skeleton. Skeleton arthropods, some amoebas, polychaetes and others it is built largely of chitin (cuticles), sometimes involving minerals such as calcium carbonate (karapaks).

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