Esophagus is tube-like structure. Its length is about 25 cm, and its width is about 1.5 cm. it locates in front of the spinal column and behind the trachea and. The major function of esophagus is passing food from mouth into stomach. There is no digestive process within esophagus. The movement of food passes throughout esophagus by muscular contraction, which even can move food against gravity. The transformation of food within esophagus takes around 10 seconds. At the end, it gets rid of food to stomach by cardiac sphincter.
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