Q: Given a scientific passage and an answer, generate a question for the given answer.
Passage: So what happens to your body's wastes? Obviously, you must get rid of them. This is the job of the excretory system. You remove waste as a gas (carbon dioxide), as a liquid (urine and sweat), and as a solid. Excretion is the process of removing wastes and excess water from the body. Answer: excretory system
A:
What body system gets rid of waste?