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प्रश्न
Give any four reasons why water is necessary in our body.
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उत्तर
Importance of water in our body:
- Water is the major component of blood, which carries nutrients and oxygen, to and from all the cells.
- It is the major component of saliva and mucous, which lubricate the membranes that line our digestive system beginning with the mouth.
- It helps in regulating the temperature of the body.
- Water is very essential for digestion as well as absorption of food.
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संबंधित प्रश्न
Which of the organs performs the function in humans?
Absorption of food
Name the hormone that helps in regulating level of sugar in our blood. Name the gland that secrets it.
Give two reasons to explain why the absorption of digested food occurs mainly in the small intestine.
Fill in the blanks in the table (1-5) by selecting the suitable names of substances from the list given below:
(steapsin, peptones, fatty acids, proteoses, protein).
| Digestive Enzymes | Acts on | To convert into |
| (i) Pepsin | _________(2) | ________(3) and |
| (ii) _______(1) | Fats |
________(4) _________(5) |
Fill in the blanks.
Grinding of food is brought about by _______ and ______
What is dental plaque?
Mention the different types of nutrition?
Define with examples: Herbivores
Describe the following: Digestion of fat in the intestine
Name the enzymes secreted by the following: Salivary glands
How do we know that we are hungry and that we should now eat?
Identify which three of the following terminologies is true for human dentition.
Identify the labels i, ii, iii, and iv in the given diagram of tooth anatomy.
Salivary glands secrete ______.
In which part of the alimentary canal food is finally digested?
Name the correct substrates for the following enzymes
- Trypsin
- Amylase
- Pepsin
- Lipase
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 | ||
Urea is a main excretory product in humans. How is it formed?
