Understanding the Gastrointestinal Tract: The gastrointestinal tract is a tract or passageway of the digestive system by which food and liquids enter the body, and solid waste is expelled as faeces. The gastrointestinal tract contains all the major organs of the digestive system for the digestion of food; it includes the mouth, pharynx, oesophagus, stomach, small intestine, large intestine, rectum, and anus.
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