After passing through your small intestine, food then moves to the large intestine. The large intestine actually surrounds much of the gastrointestinal tract and covers the outer perimeter of your abdomen. Around five feet long, the large intestine absorbs salts and liquid left over from the digestive process.  Most nutrients are already absorbed by the time food enters your large intestine. Some substances are left over, including:
Fiber.
Plant material (which is hard to digest).
Dead cells.
Water.
Bile pigments.
After passing through the colon for reabsorption, these substances exit your body in the form of waste through your anus.