By far the most complicated part of our GI tract is the stomach, because it does both the back and forth, uh, sloshing around that the small bowel does, but in addition, it has to coordinate a squeeze with the relaxation of the pylorus several. Times a minute to induce small amounts of gastric emptying, and so it's not uncommon that when children haven't been fed and they've had an injury, the coordination of the stomach is completely off.