Digestive tract: The gastrointestinal system (or digestive tract, also often referred to as the digestive tract) is the organ system of multicellular animals that takes in food, digests it for energy and nutrients, and evacuates the surplus in fecal matter. Digestion is important for breaking down food into nutrients, which the body uses for energy, growth, and cell repair. When we eat, food is chewed and broken down into large...
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