Cellulose fiber is not digested by the human digestive system, but also bear in mind that digestion does not work with 100% efficiency, so even nutrients that we digest are not completely digested. Anything not digested will, in due course, be eliminated in the form of a bowel movement.
Waste
waste
The liquid part of the body that carries nutrients from the digested food is plasma.
waste
Plasma is the blood that carries digested food
plasma
inestines
Large intestine
The food that isn't digested is called waste.
Most food is digested in the stomach.
It is digested the same way your other food are digested.
Small Intestine