翻訳と辞書 Words near each other ・ Holderness (disambiguation) ・ Holderness (surname) ・ Holderness (UK Parliament constituency) ・ Holderness baronets ・ Holderness by-election, 1939 ・ Holderness Drain ・ Holderness Formation ・ Holderness Free Library ・ Holderness Gazette ・ Holderness Inn ・ Holderness museums ・ Holderness Rural District ・ Holderness School ・ Holderness Wapentake ・ Holderness, New Hampshire ・ Holdfast ・ Holdfast (disambiguation) ・ Holdfast Bay ・ Holdfast Bay Handicap ・ Holdfast Point ・ Holdfast Trainer ・ Holdfast, Saskatchewan ・ Holdfast, Worcestershire ・ Holdgate ・ Holdgate Castle ・ Holdhus ・ Holdhus Church ・ Holdi ・ Holdin on to Black Metal ・ Holdin' Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Holdfast ： ウィキペディア英語版 Holdfast A holdfast is a root-like structure that anchors aquatic sessile organisms, such as seaweed, other sessile algae, stalked crinoids, benthic cnidarians, and sponges, to the substrate.  Holdfasts vary in shape and form depending on both the species and the substrate type. The holdfasts of organisms that live in muddy substrates often have complex tangles of root-like growths. Those of organisms that live in sandy substrates are bulb-like and very flexible, such as the holdfast of sea pens, thus permitting the organism to pull the entire body into the substrate when the holdfast is contracted. The holdfasts of organisms that live on smooth surfaces (such as the surface of a boulder) have the flattened base of the holdfast literally glued to the surface. The organism derives no nutrition from this intimate contact with the substrate, as the process of liberating nutrients from the substrate requires enzymatically eroding the substrate away, thereby increasing the risk of organism falling off of the substrate. ==References== 〔 es:Rizoide 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「Holdfast」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.