nephridia

例句：

1. 1. The kidneys filter the blood and remove waste products.
   肾脏过滤血液并清除废物。
2. 2. Kidney disease is a common health issue affecting millions of people worldwide.
   肾脏疾病是全球数百万人常见的健康问题。
3. 3. The nephridia are responsible for transporting waste products from the kidneys to the urinary system.
   肾管负责将废物从肾脏输送到泌尿系统。