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Question
How is the small intestine designed to absorb digested food?
Solution
Small intestine comprises three parts- duodenum, jejunum and ileum. Ileum is the longest part of the small intestine. It contains minute finger like projections called villi where absorption of food takes place. They are approximately 4 million in number. Internally, each villus contains fine blood capillaries and lacteal tubes.
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RELATED QUESTIONS
Why does absorption of digested food occur mainly in the small intestine?
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 help to ingest food. However, the finger-like outgrowths of the human intestine help to
Name the parts of the alimentary canal where
digested food gets absorbed
Choose the odd one out from each group and give reasons.
oesophagus, small intestine, large intestine, rectum
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 |
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.
Visit a doctor and find out:
- Under what conditions does a patient need to be on a drip of glucose?
- Till when does a patient need to be given glucose?
- How does glucose help the patient recover?
Write the answers in your notebook.
