Biology for IGCSE & O level - Human Nutrition (Section 2 - No. 33)
What is the purpose of peristalsis?
To increase the surface area of food.
To mix the food with digestive enzymes.
To move food through the digestive tract.
To break down the food mechanically.
Explanation
Peristalsis is the rhythmic muscular contractions that move food along the digestive tract.
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