Answer and Explanation:
In "Dante's Inferno" we are introduced to the nine cycles of Hell, which Dante must go through to complete his journey in search of Beatrice, the woman he loves. These cycles of hell are called limbo, lust, gluttony, greed, anger, heresy, violence, fraud and betrayal. As Dante progresses through the cycles, sins become stronger and more destructive.
This entire narrative can be used as an allegory for the human digestive tract. That's because, like Dante's Inferno, the human digestive tract has nine phases that are determined by different organs. These organs are mouth, pharynx, esophagus, stomach, small intestine, large intestine, liver and pancreas. When a food enters the human system and passes through the mouth (the first cycle of the digestive tract) it starts a journey of digestion, where as it advances through the cycles it becomes more digested and has the purpose of nourishing the human body.
It is important to point out that an allegory is a figure of language that allows the transmission of meanings between different things, where the meaning of one can be adapted and transmitted to another.