翻訳と辞書 Words near each other ・ Penion ・ Penion benthicolus ・ Penion benthicolus delli ・ Penion chathamensis ・ Penion cuvieranus ・ Penion cuvieranus jeakingsi ・ Penion ormesi ・ Penion sulcatus ・ Penionomus ・ Peniophora ・ Peniophora albobadia ・ Peniophora cinerea ・ Peniophora quercina ・ Penile prosthesis ・ Penile sheath ・ Penile spines ・ Penile subincision ・ Penile, Louisville ・ Penilee ・ Penimepicycline ・ Penin ・ Penina Golf and Resort ・ Penina Moise ・ Penina Muhando ・ Penina Taylor ・ Peninah Arusei ・ Peninah Jepchumba ・ Peningi ・ Penington ・ Peninj Mandible 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 Penile spines ： ウィキペディア英語版 Penile spines Many mammalian species have developed keratinized penile spines along the glans and/or shaft, which may be involved in sexual selection. These spines have been described as being simple, single-pointed structures (macaques) or complex with two or three points per spine (strepsirrhines). Penile spine morphology may be related to mating system. == Non-human mammals == Felines, especially domestic cats, are well known for having penile spines. Upon withdrawal of a cat's penis, the spines rake the walls of the female's vagina, which may cause ovulation. Penile spines in chimpanzees and mice are small surface projections made by the piling up of keratinized cell layers in the outermost skin surface.〔Hill, W.C.O. Note on the male external genitalia of the chimpanzee. ''Proc.Zool.Soc. Lond.'' 116, 129–132 (1946)〕〔Murakami, R. A histological study of the development of the penis of wild-type and androgen-insensitive mice. ''J. Anat.'' 153, 223–231 (1987)〕 They also occur in spotted hyenas, fossas, and echidnas. 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「Penile spines」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.