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प्रश्न
What are villi?
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उत्तर
The ileum is the longest part of the small intestine. It contains minute finger-like projections called villi. They help in the absorption of food.
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संबंधित प्रश्न
How is the small intestine designed to absorb digested food?
Match the items of Column I with suitable items in Column II.
| Column I | Column II | ||
| (a) | Salivary gland | (i) | Bile juice secretion |
| (b) | Stomach | (ii) | Storage of undigested food |
| (c) | Liver | (iii) | Saliva secretion |
| (d) | Rectum | (iv) | Acid release |
| (e) | Small intestine | (v) | Digestion is completed |
| (f) | Large intestine | (vi) | Absorption of water |
| (vii) | Release of faeces |
What is the special name of the contraction and expansion movement which pushes the food further in our digestive tract (or alimentary canal)?
Define the following term :
Pylorus
Define the following term:
Assimilation
Study the diagram given below and then answer the question that follows:
Name the parts labelled 1, 2, 3, 4, 5 and 6.
Define the term ‘digestion’.
Fill in the blanks.
Pepsin acts on ________ to change them into _______ and __________.
Write short answers
Write the names of three enzymes which are found in pancreatic juice.
Answer in detail.
What is meant by digestion? How does it differ from nutrition?
Define with examples: Carnivores
Describe the human salivary gland.
How do the salivary glands come to know that there is food in the mouth and it is time to secrete saliva?
Write down the explanation.
Explain the structure of tooth.
Circle the odd one.
Identify the correct human dental formula.
A fluid containing the digestive enzyme ____________ is secreted by the serous cells of salivary gland.
Cellulose-rich food substances are good source of roughage in human beings because ______.
Fill in the blanks using the words listed below.
| water, front, intestinal, salts, pseudopodia, back, vacuole |
- The digestion of all food components is completed by the ______ juice.
- Large intestine absorbs ______ and some ______ from the undigested food.
- Tongue is attached at the ______ to the floor of the mouth cavity and is free at the ______.
- Amoeba pushes out ______ around the food and traps it in a food ______.
Solve the crossword given as Figure.
| Across | Down | ||
| 1. | Cream-coloured digestive gland | 2. | Feeds with the help of pseudopodia |
| 3. | Undigested excretory solid residues | 6. | Total number of molars in one jaw of an adult |
| 4. | Organ that mixes saliva with the food | 8. | Largest gland |
| 5. | Point of defecation | 9. | Watery secretion in the mouth |
| 7. | Stored in gall bladder | 11. | A ruminant |
| 10. | Finger-like outgrowth in the small intestine | 12. | Form of food chewed by ruminants |
| 13. | Kind of taste buds | ||
| 14. | Kills bacteria in the stomach | ||
