Explanation by: Mr. Dubey

The small intestine is the primary site for the absorption of nutrients into the blood. It has tiny hair-like structures called villi, which increase the surface area for absorption of nutrients like proteins, fats, carbohydrates, vitamins, and minerals.

Why other options are incorrect:

  • (B) Belly – Not a specific part of the digestive system, and nutrients are not absorbed here.
  • (C) Large intestine – The large intestine absorbs water and salts, but not most nutrients.
  • (D) Mouth – The mouth is involved in mechanical digestion and the start of chemical digestion, but not nutrient absorption.

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