Jacobson's organ

Japanese: ヤコプソン器官 - ヤコプソンきかん（英語表記）Jacobson’s organ

Named after its discoverer, LL Jacobson (1783-1843), it is also called the vomeronasal organ. It is a pouch-like olfactory organ formed by a part of the nasal cavity of terrestrial quadrupeds that bulges on both sides, and is innervated by the vomeronasal nerve extending from the accessory olfactory bulb, located on the medial side of the posterior part of the olfactory bulb. It is usually a cecum, and in amphibians it opens into the nasal cavity, while in reptiles and many mammals it opens into the oral cavity through the nasopalatine duct. In snakes and lizards, tears flow from the lacrimal duct into Jacobson's organ, moistening its inner wall (Figure).

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

発見者ヤコプソンL.L.Jacobson(1783‐1843)にちなんで名づけられ，鋤鼻（じよび）器官vomeronasal organともいう。陸上四足動物の鼻腔の一部が左右にふくらんでできた囊状の嗅覚器官で，嗅球の後部内側の副嗅球からのびた鋤鼻神経に支配される。ふつうは盲囊になっていて，両生類では鼻腔内へ，爬虫類と多くの哺乳類では鼻口蓋管を通じて口腔内に開く。ヘビ，トカゲ類では涙管からの涙がヤコプソン器官へ流れ，内壁を湿らせる（図）。

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

<<: The Epistle of James - The Epistle of James

>>: Jakobson, Roman