Explain nutrition in human body.
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Gaurav Seth 5 years, 4 months ago
1. In humans, digestion of food takes place in the alimentary canal, made up of various organs and glands.
2. In the mouth, food is crushed into small particles through chewing and mixed with saliva, which contains amylase for digesting starch.
3. Food passes through the pharynx and oesophagus to reach the stomach. Gastric juice contains pepsin (for digesting proteins), HCl and mucus.
4. In the small intestine, carbohydrates, proteins and fats are completely digested into glucose, amino acids, fatty acids and glycerol.
5. The villi of the small intestine absorb the digested food and supply it to every cell of the body.
6. The undigested food is removed from the body through the ****.
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