前肾的位置靠近体腔的前段，由许多排泄小管(肾小管renal tubules)组成。
山羊胚胎重新反应了系统进化的过程，该过程通过前肾，中肾和后肾。
The goat embryo re-acted the process of the system evolution, which passed through pronephros, mesonephros and metanephros.
八目鳗类鱼有中肾，并且通常是其前肾的新生物。
Hagfish have a mesonephric kidney and are often neotenic of their pronephric kidney.
新款宝马5系改版了前雾灯和双肾栅栏，于本周在美国销售，售价44 550美元。
The new 5-Series, which abandoned the flared headlights and small kidney-shaped grill of the previous version, starts at $44, 550 in the U.S.
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