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Development of the ears : ウィキペディア英語版 | Development of the ears
Ear embryology concerns the development of the ear, the organ responsible for hearing and equilibrium processes. During embryotic formation, the ear develops into three different structures: the inner ear, the middle ear and the outer ear. The inner ear consists of the vestibulocochlear organ. The middle ear consists of the tympanic cavity and the epytimpanic recess. The external ear consists of the auricule and the external acoustic meatus. Each structure originates from different germinative layers or tissues: the ectoderm, endoderm and mesenchyme.〔 The ear begins to appear during the 22nd day of embryotic development.〔 ==Development of parts of the ear==
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「Development of the ears」の詳細全文を読む
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