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  •   Question 14 Food does not pass through the digestive system by “gravity”. This is clear from the fact that we can digest food even if w

Food does not pass through the digestive system by “gravity”. This is clear from the fact that we can digest food even if we are lying down. Explain the logic behind the passage of food through our digestive system.

 

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Food does not move through the digestive tract because of gravity. Instead, the movement of food is controlled by peristalsis.

Peristalsis is a series of rhythmic, wave-like muscular contractions of the walls of the alimentary canal.

These contractions:

  • Push food forward from the oesophagus to the stomach

  • Then through the intestines

  • Eventually to the rectum for removal

Peristalsis works regardless of body position—sitting, standing, or lying down.

Posted by

Saumya Singh

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