metanephros

例句：

1. 1. The kidneys filter the blood to remove waste products.
   肾脏过滤血液以去除废物。
2. 2. Kidneyfailure is a serious condition that requires immediatemedical attention.
   肾功能衰竭是一种严重的状况，需要立即医疗关注。
3. 3. The nephrons are responsible for removing waste products fromthe blood.
   肾单位负责从血液中移除废物。