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

Fact 2: Leptospiral organisms cause infection in the kidneys and are excreted in urine.

Given the two facts above, answer the question "What is part of an animal's excretory system?" with the following options: 
- alveoli
 - garbage chute
 - pollen
 - glucose
 - bloodstream
 - kidneys
 - food
 - intake


 

      kidneys   