Certain foods or components of some foods do not break down as easily as others. People without gastrointesinal diseases will see things like corn, the membranes of oranges, etc in their stools. I personally have seen mushrooms, bean sprouts, etc in mine. Part of the problem comes from NOT CHEWING ones food enough. Another reason food that has not been broken appears in the stool is when the contents of the stomach leave before digestion is complete. Some medications will cause the stomach to empty prematurely. Stomach surgery like gastric by-pass can also cause the stomach to empty prematurely. This is called "dumping syndrome."
Gastric emptying is simply the stomach emptying. The time it takes for the stomach to empty depends on what was eaten, the amount, and the individual.
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