digestion of a sandwich

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Imagine you are eating a sandwich containing wheat bread, ham, lettuce, and Swiss cheese. Do you ever wonder where the nutrients go from all of the previous listed ingredients? Well, when a bite of this sandwich is taken, the mouth produces a saliva enzyme called amylase. This enzyme immediately goes to work by breaking down the carbohydrates that are in the bread. Once, the bite is completely chewed, the contents then are swallowed and go down the esophagus and begin to head towards the upper esophageal sphincter and the is involuntarily pushed towards the stomach. The next passage for the sandwich is to go through the lower esophageal sphincter; which transports the sandwich into the stomach.
Once in the stomach, the glands that are there begin to secrete enzymes and a mucous that help to protect the stomach from its own acids. While this is being done, the muscles of the stomach are contracting. This causes the food to be turned and moved all throughout the stomach. This process turns the food into chyme, which is just a liquefied version of the food that was first taken...

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