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Lateral to either olfactory groove are the internal openings of the anterior and posterior ethmoidal foramina (or canals). The posterior ethmoidal foramen opens at the back part of this margin under cover of the projecting lamina of the sphenoid, and transmits the posterior ethmoidal vessels and nerve. ==Additional images== File:Gray135.png|Frontal bone. Inner surface. File:Gray159.png|Left maxillary sinus opened from the exterior. File:Gray514.png|The ophthalmic artery and its branches. File:Skull_foramina_labeled.svg|Labeled photo of foramina of skull base. 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「posterior ethmoidal foramen」の詳細全文を読む スポンサード リンク
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