ventral side

Japanese: ventral side(英語表記)ventralside
ventral side

…In both fish and tetrapods, the muscular region above the level of the spine is called the dorsal region, but no boundary can be established. Regardless of whether or not there is a differentiated part called the ventral region, when an animal's body faces a certain direction relative to the horizontal ground due to some kind of gravity sense, that side, or the lower side, is generally called the ventral side, and the opposite side, or the upper side, is called the dorsal side. Generally, the dorsal side is where the tentacles, various sensory organs, shell, carapace, etc. are developed, while the ventral side is where the muscles of the legs and so on are developed, and where the mouth and anus are located.

*Some of the terminology that mentions "ventral side" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…魚類でも四足動物でも脊柱のレベルより上の筋肉質の領域は背と呼ぶが,境界は設定できない。 なお,腹または腹部として分化した部分の有無にかかわらず,動物体がなんらかの重力覚によって水平な地面に対して一定の面を向ける場合,一般にその面つまり下の面を腹または腹側ventral sideといい,反対側の面つまり上の面を背または背側dorsal sideという。一般に背側では触手や諸種の感覚器官,殻や甲などが発達し,腹側では足などの筋肉が発達し,口と肛門がある。…

※「ventral side」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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