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Question
Choose the odd one out from each group and give reasons.
oesophagus, small intestine, large intestine, rectum
Solution
The small intestine is the odd one out because no digestive juices are released by other parts and hence no digestion occurs in other parts.
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Read the following statements with reference to the villi of the small intestine.
- They have very thin walls.
- They have a network of thin and small blood vessels close to the surface.
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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 |
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Assertion (A): The inner walls of the small intestine have finger like projections called villi which are rich in blood.
Reason (R): These villi have large surface area to help the small intestine in completing the digestion of food.
