Urine is the liquid waste product of the body that is excreted by the urinary system, and mammals excrete urea in the watery form of urine . Given these facts, what is a waste product of the body that is excreted by the urinary system among the following options:
- potash
 - food
 - CO 2
 - sugar
 - urea
 - liquid
 - H 2 O
 - sulfur


 

     urea    