Air space - Gankikou

Japanese: 含気腔 - がんきこう
Air space - Gankikou

…Medically, it is pronounced “fukubikuu.” It refers to the air-filled spaces (called air cavities) that are connected to the nasal cavity and have developed in the surrounding bones. There are four of them on each side of the face: the maxillary sinus, the ethmoid sinus, the frontal sinus, and the sphenoid sinus. The paranasal sinuses also develop with age. …

*Some of the terminology that mentions "air space" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…医学的には〈ふくびくう〉と読む。鼻腔と交通していて,周囲の骨の中に発育した,空気で満たされた空間(含気腔という)をさし,上顎洞,篩骨(しこつ)洞,前頭洞,蝶形(ちようけい)洞の四つが顔面の各側に存在する。副鼻腔も年齢とともに発育する。…

※「含気腔」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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