Mechanism of Food Digestion


 
 
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Mechanism of Food Digestion

Mechanism of Food Digestion:

The various processes involved in utilization of food in humans are:

  • The process of taking food into the body is called ingestion.
  • The process by which the food containing large insoluble substances is broken down into small water soluble substances is called digestion. There are two methods of digesting food, i.e. physical method (including chewing and grinding of food in mouth) and chemical method (addition of digestive juices by the body itself)
  • The process by which the digested food passes through the intestinal wall into blood stream is called absorption.
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    Sample Questions
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    Question : 1

    Which of the following are correct ?

    (a) Ingestion is the process of  intake of food by mouth. Food is moistened by ‘saliva’, before swallowing, masticated by teeth to smaller particles.

    (b) The process of breaking down large organic molecules like carbohydrates into simple molecules like sugar is called digestion.

    (c) Intake of digested food by the cells of the body is called absorption .

    Right Option : A
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