翻訳と辞書 Words near each other ・ Skull Heads ・ Skull Island ・ Skull Island (Australia) ・ Skull Island (disambiguation) ・ Skull Island (Washington) ・ Skull Islet ・ Skull Lake ・ Skull Man ・ Skull Mountain ・ Skull mounts ・ Skull Murphy ・ Skull of a Skeleton with Burning Cigarette ・ Skull Orchard ・ Skull Ring ・ Skull Rock ・ Skull roof ・ Skull Run, West Virginia ・ Skull Snaps ・ Skull the Slayer ・ Skull Tower ・ Skull Valley ・ Skull Valley (Utah) ・ Skull Valley Elementary School District ・ Skull Valley Indian Reservation ・ Skull Valley, Arizona ・ Skull-A-Day ・ Skull-Face ・ Skull-Face and Others ・ Skullage ・ Skullbone, Tennessee 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 Skull roof ： ウィキペディア英語版 Skull roof The skull roof, or the roofing bones of the skull, are a set of bones covering the brain, eyes and nostrils in bony fishes and all land-living vertebrates. The bones are derived from dermal bone, hence the alternative name dermatocranium. More or less incorporated in the skull roof is the upper jaw and the endocranium. ==Origin== The early armoured fish did not have a skull in the common understanding of the word, but had an endocranium that was partially open above, topped by dermal bones forming armour. The dermal bones gradually evolved into a fixed unit overlaying the endocranium like a heavy "lid", protecting the animal's head and brain from above. Cartilaginous fish whose skeleton is formed from cartilage lack a continuous dermal armour and thus have no proper skull roof. A more or less full shield of fused dermal bones was common in early bony fishes of the Devonian, and particularly well developed in shallow water species. 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「Skull roof」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.