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The rhythmic waves of contraction and ex...

The rhythmic waves of contraction and expansion that allow the food to pass through oesophagus are called ______

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**Step-by-Step Solution:** 1. **Understanding the Question**: The question asks about the rhythmic waves of contraction and expansion that help in moving food through the esophagus. 2. **Identifying the Process**: When food is swallowed, it forms a bolus in the mouth. This bolus needs to be transported from the mouth to the stomach through the esophagus. 3. **Role of Muscles**: The esophagus contains two layers of smooth muscles: the outer longitudinal muscle and the inner circular muscle. These muscles work together to facilitate the movement of food. ...
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