Carbohydrate AbsorptionAll normally digested dietary carbohydrates are absorbed; indigestible fibers are eliminated in the feces. The monosaccharides glucose and galactose are transported into the epithelial CELLS by common protein carriers VIA secondary active transport (that is, co-transport with SODIUM ions).The anus is an opening at the far-end of the digestive tract and is the exit point for the waste material. Two sphincters regulate the exit of feces, the inner sphincter is involuntary and the outer sphincter is voluntary.Further digestion and absorption take place in the small intestine. The large intestine reabsorbs water from the undigested food and stores waste until elimination.Only about five percent of starches are BROKEN down in the mouth. (This is a good thing as more glucose in the mouth would lead to more tooth decay.) When carbohydrates reach the STOMACH no further chemical breakdown occurs because the amylase enzyme does not function in the acidic conditions of the stomach.