Question : Vegetables and fruits should be a part of our diet because they stimulate:
Option 1: peristalsis
Option 2: salivation
Option 3: excretion
Option 4: respiration
Correct Answer: peristalsis
Solution : The correct answer is peristalsis.
Peristaltic movements happen in the oesophagus of the human body. They aid the movement of food from mouth to stomach. They are wave-like movements created by contraction and relaxation of muscles of the gastrointestinal tract. These are involuntary movements. Food items rich in roughage like vegetables, and fruits are necessary for the diet because they help in peristaltic movements.
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