Pharyngeal tonsils - tonsils

Japanese: 咽頭扁桃 - いんとうへんとう
Pharyngeal tonsils - tonsils

…Tonsils generally refer to two almond-shaped masses of flesh on either side of the isthmus (the narrow opening that leads from the oral cavity to the pharynx), more precisely, lymphoreticular tissue, but strictly speaking, they should be called palatine tonsils. Similar tissues include the pharyngeal tonsil (adenoid), eustachian tube tonsil, lingual tonsil, intermediate tonsil, pharyngeal lateral cord, and retropharyngeal lymph follicle, which form a ring in the pharynx, the first barrier to the respiratory and digestive systems. These lymphoid tissues, called Waldeyer's tonsillar ring, take in antigens such as bacteria and produce antibodies to defend the body. …

*Some of the terminology that mentions "pharyngeal tonsils" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…一般に扁桃といえば,口峡(口腔から咽頭に入る狭い咽門)両側にあるアーモンド(扁桃)の形をした二つの肉塊,正確にはリンパ網様組織を指していうが,厳密にはこれは口蓋扁桃と呼ばれるべきである。同じような組織に咽頭扁桃(アデノイド),耳管扁桃,舌扁桃,中間扁桃,咽頭側索,咽後リンパ濾胞などがあり,呼吸ならびに消化器の第1関門である咽頭において環状を成す。ワルダイエル扁桃輪Waldeyer’s tonsillar ringと呼ばれるこれらリンパ組織は,細菌などの抗原をとりこみ,抗体をつくって生体の防御に当たる。…

※「咽頭扁桃」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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