Warning: file_put_contents(): Only 0 of 6521 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/001308.com/index.php on line 55 pronephros是什么意思，pronephros的翻译，pronephros音标、读音、用法和例句_零食美味英文词典
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。