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Peristalsis is a series of wave-like muscle contractions that move food through the digestive tract. It starts in the esophagus where strong wave-like motions of the smooth muscle move balls of swallowed food to the stomach. ... Stretching out a piece of intestine will make it easier to see the wave-like motion.
Is Gary free ?
'You didn't know that was wrong, but now you do. If you do it again, I'll know you are doing it on purpose.'