Warning: file_put_contents(): Only 0 of 4884 bytes written, possibly out of free disk space in /www/wwwroot/ppbbu/5256789.com/index.php on line 55 pronephros例句_pronephros英汉例句_pronephros双解例句_绿查网谷歌词典
The pronephros does not function, but it marks at the fourth week of development the start of renal development. 前肾生肾节内，从头侧至尾端先后出现横行前肾小管，内侧端开口于胚内体腔，外侧端与头尾走行的前肾管相通。