as Endoskelett one designates a mechanical supporting structure (a skeleton) in biology inside the body of an animal. It is one of the most remarkable common characteristics of all vertebrate animals.
A Endoskelett consists of firm elements, which can be moved over muscles against each other. With humans and at most groups of vertebrate animals these elements are generally called bones. Further important component of Endoskeletten are the cartilages.
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|Wiktionary: Endoskelett - word origin, synonyms and translations|