来自《耶鲁大学开放课程：生物医学工程探索 第16集 第16集》

• 
  
  The kidney has mechanisms for taking molecules directly
  肾脏有一种机制将分子
• 
  
  from the blood and pumping them into the urine.
  直接从血液中取出并泵入尿液中
• 
  
  That's a little--that's a specialized function
  那是有一点 有些特别的功能
• 
  
  that's a little bit beyond where we need to go.
  这有些超前了
• 
  
  I wanted to show it to you for--
  我想给你们展示一下
• 
  
  where we have time to go I wanted to show it to you for completion.
  如果我们有时间为将向你们完整的展示
• 
  
  If you go on to study physiology you'll learn a lot about this.
  如果去学生理学你将学很多这方面的内容
• 
  
  There's filtration,re-absorption,
  滤过 重吸收
• 
  
  this accounts for the majority of what
  在形成尿液的过程中
• 
  
  happens in terms of processing to form urine,
  这占了主要的部分
• 
  
  but there's also secretion,
  但还有分泌
• 
  
  and then finally the urine that goes to the bladder and is eliminated.
  终于尿液流至膀胱并排出体外