Chewing of food and breaking it down into smaller pieces in the mouth and the stomach is a physical activity. Digestion also involves chemical break down of food. Explain
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chemically, hcl present in our stomach breaks down food during digestion
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The digestive system plays an important role in the absorption of nutrients into the body. It takes the food we ingest, breaks it down mechanically and chemically in the mouth and stomach. It then absorbs nutrients, fats, proteins and water in the intestines before eliminating the waste through the rectum.
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