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Question

Write a short note on mechanical digestion and chemical digestion.  [3 MARKS]

 


Solution

Each point: 1.5 Mark

1. Mechanical digestion: It involves mastication (chewing, mashing, and breaking) into smaller particles. In the mouth, teeth cuts and grinds the food. Rolling action of tongue and secretion of saliva rolls the food into a bolus.
2. Chemical digestion: It involves changing food into smaller particles through the action of enzymes. It involves the breakdown of the larger molecules by hydrolysis.
 

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