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The layers are discussed below, from the inside lin. What is the alimentary canal? Overview of the digestive system—how food moves through each part of the gi tract to help break down food for energy, growth, and cell repair.
Food passes through a long tube inside the body known as the alimentary canal or the gastrointestinal tract (gi tract).
The human digestive system consists of the gastrointestinal tract plus the accessory organs of digestion (the tongue, salivary glands, pancreas, liver, and gallbladder). The digestive system is one of the most clearly defined in the body. Although the term digestion, strictly speaking, means the breakdown of food by enzymatic action, we will expand the term to include both the physical and chemical processes that reduce food. The labels are grouped into subcategories, the user can choose to hide or show those labels.