Fact 1: Urine is the liquid waste product of the body that is excreted by the urinary system.

Fact 2: Nitrogenous wastes leave the body in the urine.

Given the two facts above, answer the question "How are nitrogenous wastes excreted?" with the following options: 
- solutes
 - wetland
 - salmon
 - urine
 - soil
 - harmful
 - gills
 - CO 2


 

    urine     