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प्रश्न
Read the following statements with reference to the villi of small intestine.
- They have very thin walls.
- They have a network of thin and small blood vessels close to the surface.
- They have small pores through which food can easily pass.
- They are finger-like projections
Identify those statements which enable the villi to absorb digested food.
विकल्प
(i), (ii) and (iv)
(ii), (iii) and (iv)
(iii) and (iv)
(i) and (iv)
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उत्तर
(i), (ii) and (iv)
Explanation:
Villi are the numerous, small finger-like projections present in the inner walls of the small intestine. Villi increase the surface area of small intestine for absorption of digested food due to their thin, finger-like shape. Each villus has a network of thin and small blood vessels close to its surface. The food absorbed on the surface of villus passes into the blood in the capillaries. Villi do not have any pores.
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संबंधित प्रश्न
Why does absorption of digested food occur mainly in the small intestine?
The longest part of alimentary canal is ______.
How is the small intestine designed to absorb digested food?
All are part of the small intestine, EXCEPT
Select the correct statement.
The enzyme responsible for the digestion of proteins in the small intestine is _____________.
Assertion: All proteins in our food are digested in the small intestine only.
Reason: The protein digesting enzymes are released into the small intestine.
The finger-like outgrowths of Amoeba helps to ingest food. However, the finger-like outgrowths of human intestine helps to ______.
Match the organs in Column I with the words listed in Column II.
| Column I | Column II | ||
| (a) | Rectum | (i) | Mucus |
| (b) | Gall bladder | (ii) | Villi |
| (c) | Stomach | (iii) | Taste buds |
| (d) | Tongue | (iv) | Faeces |
| (e) | Small intestine | (v) | Bile juice |
Finger-like projections enhance the absorbing capacity of the small intestine.
