Explain the role of mouth in digestion of food.
Mouth is a part of the alimentary canal and is bounded by two movable lips and mouth leads into the vestibule.
Role of mouth in the digestion of food are as follows:-
1. Food (solid or liquid material) is taken into the oral cavity through the mouth and the process is known as Ingestion.
2. In the mouth saliva is secreted by the salivary glands which moisten the food and make them available to chew and swallow easily.
3. Mastication process is followed by grinding the teeth from large pieces into smaller particles which then gets mixed with ptyalin.
4. Salivary amylase enzyme that is present in saliva breaks down starch into simple sugar molecules.
Find out, from Table 10.3, the medium having highest optical density. Also find the medium with lowest optical density.
| Material medium |
Refractive index |
Material medium |
Refractive index |
| Air | 1.0003 | Canada Balsam |
1.53 |
| Ice | 1.31 | ||
| Water | 1.33 | Rock salt | 1.54 |
| Alcohol | 1.36 | ||
| Kerosene | 1.44 | Carbon disulphide |
1.63 |
| Fused quartz |
1.46 | ||
| Turpentine oil |
1.47 | Ruby | 1.71 |
| Benzene | 1.50 | Sapphire | 1.77 |
| Crown glass |
1.52 | Diamond | 2.42 |
Table 10.3 Absolute refractive index of some material media
NCERT questions are designed to test your understanding of the concepts and theories discussed in the chapter. Here are some tips to help you answer NCERT questions effectively:
Welcome to the NCERT Solutions for Class 10 Science - Chapter . This page offers a step-by-step solution to the specific question from Excercise 0 , Question 63: Explain the role of mouth in digestion of food.....
Comments