Biology for IGCSE & O level - Human Nutrition (Section 4 - No. 17)
Which of the following is true about the movement of food through the oesophagus?
It relies on gravity alone.
It occurs through peristalsis.
It involves the churning action of the stomach.
It's controlled by enzymes in the saliva.
Explanation
Food moves through the esophagus via peristalsis, which is a wave-like contraction of the muscular walls.
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