How does eating fiber help your excretory system?

Answer 1

Fiber is sometimes called "Roughage." Why? Because it's rough, in a good way.

See, when you digest food, build up can... build up, on the intestines. However, your body cannot digest fiber. Because it cannot be digested, as the fiber passes through your digestive system, it scrapes off the build up. That's how it helps you.

You know those fish in an aquarium that clean the glass? Fiber is kind of like those fish. It cleans up!