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C. Alimentary canal
The gastrointestinal tract, also called the digestive tract, or alimentary canal, is the organ system in multicellular animals that consume food, digest it to extract energy and nutrients and expel the remaining waste.
The gastrointestinal tract, also called the digestive tract, or alimentary canal, is the organ system in multicellular animals that consume food, digest it to extract energy and nutrients and expel the remaining waste.