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ICSE Class 9 Biology Question 3 of 11

Nutrition [Nutrition in General] — Question 4

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Question 4

Taking the examples of whole grain atta, fruit and green leafy vegetables, describe how roughage in our diet is useful.

Answer

Whole grain atta, fruits and green leafy vegetables are the chief sources of roughage. The benefits of roughage are:

  1. It enables undigested food to move easily through the intestines.
  2. It stimulates secretion from the digestive tract.
  3. It helps in the removal of cholesterol and toxins.
  4. It prevents constipation as it absorbs water and retains it making the faecal matter soft.
  5. It simulates the muscle contraction in the intestinal wall, making the movement of faecal matter easy.