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by fiona basil (2021-12-04)

Digestion of food or drink starts at the mouth. The muscles in the esophagus push the food down to the lower esophageal sphincter, a ring of muscle that separates the esophagus from the stomach. The sphincter opens to let food into the stomach, and the stomach mixes it with digestive juices and acid. The stomach pushes the mixture into the small intestine. Probio-7