Esophagus (sometimes known as the gullet) - the least complex section of the digestive tract, it is a continuous muscular tube through which food passes from the pharynx to the stomach. Food absorption in the esophagus is virtually nil.

It is made out of tissue that is largely resistant to trauma from sharp objects which may be swallowed like bones or large pieces of food.

Common disorders involving the esophagus

In both cases, the lower sphincter does not close properly, allowing acid from the stomach to reflux back into the esophagus.

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