The development of the kidney, the major excretory organ after birth, consists of 3 stages: the pronephros, mesonephros and metanephros.

体主要排泄器官，它发育经原、中、后3个段。

Fluoride is a widely distributed nephrotoxin with exposure potentially resulting from environmental fluorine excess.Kidney is the main excretory organ of fluorine.

氟主要排泄器官，当机体摄入量氟超排泄能力时，组织细胞就会因处于高氟环境而受到损害。