Observe the diagram of Human digestive system. 

Q16 - Human digestive system - Teachoo.jpg

Match the labeling referred in column I and correlate with the function in column II. 

Q 16 - correlate with the function in column - Teachoo.jpg

(A) i.- a) ; ii – b) ; iii – c) ; iv- d) 

(B) i.- b) ; ii – c) ; iii – d) ; iv- a) 

(C) i.- b) ; ii – d) ; iii – c) ; iv- a) 

(D) i.- d) ; ii – a) ; iii – b) ; iv- c) 


Answer - 


  1. (i) is the mouth
  2. (ii) is the liver
  3. (iii) is duodenum
  4. (iv) is intestine


Now, let’s check it’s functions 

  • For (i) - The initial phase of digestion begins in the mouth where salivary amylase breaks down the starch into sugars .

  • For (ii) - The liver secretes Bile, which breaks fats into small globules…making it easy for the lipase enzyme to digest them.
    Thus it increases efficiency of lipase enzyme action

  • For (iii) - The duodenum is the place where all enzymes are secreted to break down fat, protein and carbohydrates. Thus, it is the site of the complete digestion of carbohydrates, proteins and fats.

  • For (iv) - Digested food is taken up by the walls of the intestine. The inner lining of the small intestine has numerous finger-like projections called villi which increase the surface area for absorption.
    Thus, the length of intestine depends on how much food we digest

Digestive system with enzymes-01.jpg

So, the correct answer is (b)

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About the Author

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CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo