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Question

In human alimentary canal, name the site of complete digestion of various components of food. Explain the process of digestion.

Solution
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Answer:
i) Small intestine is the site of complete digestion of various components of a food.
ii) Process of digestion
  • Food is chewed with digestion of starch by the action of salivary amylase present in the mouth.
  • The formed bolus passes down the esophagus into the stomach by the action of peristalsis.
  • Gastric juices further acts on food for the digestion of proteins and forms chyme.
  • This chyme enters the duodenum where digestive enzymes from pancreas and bile juice from liver mixes with it and then passes through the small intestine.
  • Absorption of nutrients occurs in the small intestine.
  • The reabsorption of water and minerals happens majorly in the large intestine.

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