Q24 of 51 Page 161

Draw a neatly labeled diagram showing a peristaltic movement in oesophagus. Explain the importance of mucus on the walls of food pipe. (AS5)

Peristaltic movements in oesophagus:
















Importance of mucus on the walls of food pipe: The walls of the food pipe secrete a slippery substance called mucus. The mucus lining lubricates and protects the oesophageal walls from any damage and helps the bolus to easily slide down the food pipe.

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