He noticed that fat introduced into the digestive tract of a rabbit undergoes no change until it has advanced a considerable distance beyond the stomach.
"Makers of Modern Medicine"
James J. Walsh
It serves a mechanical purpose in the digestive tract by helping to fill the organs and dilute the real food.
"Ontario Teachers' Manuals: Household Management"
Ministry of Education
In old age the diet should also be simple, because of the lack of vigour in the digestive organs, but the amount of building material should be decreased.
"Ontario Teachers' Manuals: Household Management"
Ministry of Education