Hermaphroditic gland

Japanese: hermaphroditic gland(英語表記)hermaphroditicgland
Hermaphroditic gland

…In dioecious animals, the female gonads are present in the female. In hermaphroditic animals, they may exist as separate organs from the testes, or they may coexist with the testes in the same organ as the hermaphroditic gland (also called ovotestis). Hermaphroditic glands are found in mollusks such as gastropods and axypods, and in vertebrates such as fish. In general, however, it is rare for ovarian and testicular functions to appear simultaneously. Depending on the individual's developmental stage, testicular functions may appear first and then begin to function as ovaries (protoandry), or conversely, ovarian functions may appear first and testicular functions appear later (protogyny). …

*Some of the terminology that mentions "hermaphroditic gland" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…雌雄異体の動物では雌個体に,雌性生殖腺として存在する。雌雄同体の動物では,精巣とは独立した器官として存在する場合と,両性腺hermaphroditic gland(卵精巣ともいう)として,同一の器官に精巣と共存している場合とがある。両性腺は,軟体動物の腹足類や斧足類,脊椎動物では魚類にその例が認められるが,一般に卵巣機能と精巣機能が同時に発現することはまれで,個体の発達段階に応じて,精巣機能が先に現れ後に卵巣として機能を開始する場合(雄性先熟),逆に卵巣機能が先行して,精巣機能が後から現れる場合(雌性先熟)が多い。…

※「hermaphroditic gland」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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