Repulsive regurgitations, icky intestines, boisterous bowels, loathsome livers, attacking acids-all of these are involved in the foul science of digestion. Can you stomach it? If not, keep a barf bucket handy! After eating your breakfast, lunch, dinner or midnight snack, you probably don't think much about that food until you visit the bathroom several hours later. But in the meantime, the edibles you gobbled up take an amazing journey-a trip through the fizzy digestive tract that's also really, really gross. Once you chomp up and swallow the food, things just keep getting nastier and nastier until the final stage-defecation!