why in esophagous direction of Bolus always toward stomach?
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The masticated food better known as bolus is directed towards the stomach in the oesophagus due to the presence of cilia on the inner lining of the food pipe. This cilia forces the food to travel unidirecionally and also results in wave like movements of the oesophagus known as Peristalsis moving the food downwards.
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After food is chewed into a bolus, it is swallowed and moved through the esophagus. Smooth muscles contract behind the bolus to prevent it from being squeezed back into the mouth. Then rhythmic, unidirectional waves of contractions work to rapidly force the food into the stomach.
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