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Observe the diagram of Human digestive system.
Match the labeling referred in column I and correlate with the function in column II.
(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 -
Here
- (i) is the mouth
- (ii) is the liver
- (iii) is duodenum
- (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
So, the correct answer is (b)
