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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Stereom ： ウィキペディア英語版 Stereom Stereom is a calcium carbonate material that makes up the internal skeletons found in sea urchins, and all other echinoderms, both living and fossilized forms. It is a sponge-like porous structure which, in a sea urchin may be 50% by volume living cells, and the rest being a matrix of calcite crystals. The size of openings in stereom varies in different species and in different places within the same organism. 〔 Edmund Bäeuerlein, ''Handbook of Biomineralization: . Biomimetic and bioinspired chemistry'', Wiley-VCH, 2007 ISBN 3-527-31805-4, page 393〕 When an echinoderm becomes a fossil, microscopic examination is used to reveal the structure and such examination is often an important tool to classify the fossil as an echinoderm or related creature. 〔 Paul D. Taylor, David N. Lewis ''Fossil Invertebrates'' Harvard University Press, 2007 ISBN 0-674-02574-1 pages 163-164 〕 ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Stereom」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.