Fact 1: Organs of excretion make up the excretory system.

Fact 2: Excess estrogen is excreted in the bowel.

Given the two facts above, answer the question "what helps make up the excretory system?" with the following options: 
- sugar
 - gills
 - h2o
 - lungs
 - aorta
 - bowel
 - fungi
 - honey


 

      bowel   