肾脏滤掉血液中的脲和其它有不利影响的化学物质，氧气透过肺脏而进入血流，胰脏则对血糖的高低作出响应而释放出胰岛素。

• The kidneys filter our blood of urea and other undesirable chemicals. The lungs allow oxygen to pass into our bloodstream and the pancreas releases insulin in response to our blood sugar levels.