The second of the three excretory organs that develop in a vertebrate embryo, becoming the functioning kidney in fish and amphibians but replaced by the metanephros in higher vertebrates.

 
  • 中腎在脊椎動(dòng)物胚胎內發(fā)育而成的三對排泄器官中的第二對,作為功能腎存在于魚(yú)類(lèi)和兩棲類(lèi)體內,但在更高級的脊椎動(dòng)物中則發(fā)育成后腎
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan