pronephron

英語（米国） (en-US) 英語（イギリス） (en-GB)

名詞

(biology) The first part of the urogenital system to be differentiated in a vertebrate embryo, which functions as a simple excretory organ in simpler forms, serves as a provisional kidney in some fish and amphibians, and only appears as a temporary embryonic structure in reptiles, birds, and mammals.

日本語の意味

脊椎動物の胚発生過程において、尿生殖系の最初の部分として分化する構造。簡単な排泄器官として機能し、一部の魚類や両生類では暫定的な腎臓の役割を果たす。爬虫類、鳥類、哺乳類では一時的な胚性構造として現れる。

英語の意味

(biology) The first part of the urogenital system to be differentiated in a vertebrate embryo, which functions as a simple excretory organ in simpler forms, serves as a provisional kidney in some fish and amphibians, and only appears as a temporary embryonic structure in reptiles, birds, and mammals.

このボタンはなに？

In many fish embryos, the pronephron acts as a temporary kidney that filters waste until more complex renal structures develop.

多くの魚の胚では、原腎はより複雑な腎構造が発達するまで、老廃物を濾過する一時的な排泄器官として機能する。

詳細

意味（1）

(biology) The first part of the urogenital system to be differentiated in a vertebrate embryo, which functions as a simple excretory organ in simpler forms, serves as a provisional kidney in some fish and amphibians, and only appears as a temporary embryonic structure in reptiles, birds, and mammals.

In addition, while in the pronephron only vacuolization was noted, the structure of the liver had an atypical appearance and there was a considerable number of erythrocytes scattered among the hepatic chords which themselves were noticeably altered.

詳細

pronephrons （ plural ）