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प्रश्न
Define the term nutrition.
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उत्तर
The process by which all organisms obtain or synthesize their food and convert it into simpler substances, so that it can be absorbed and utilized by the cells of the body is called nutrition.
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संबंधित प्रश्न
Water from the undigested food is absorbed mainly in the ______.
| When a person eats sugary food, then organisms A present in his mouth act on sugar to produce a substance B. The substance B first dissolves the calcium salts from the top part C of the tooth and then from its middle part D forming holes E. These holes ultimately reach the part F in the lower part of tooth which contains nerves and blood vessels. The substance B irritates the nerve endings inside the tooth causing toothache. |
- What are (i) organisms A, and (ii) substance B?
- What are (i) part C, and (ii) part D, of tooth known as?
- By what name are the holes E in the tooth known?
- Name the part F of the tooth.
- What will happen if organisms A reach part F of the tooth known?
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