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प्रश्न
Open your mouth, look into a mirror and try to count the different types of teeth in your mouth. Compare them with Figure on page 13 of your NCERT textbook.
Record your observations in the table below:
| Type of teeth | Number of teeth | |
| In my mouth | In the figure | |
| Incisors | ||
| Canines | ||
| Premolars | ||
| Molars | ||
- Did you observe any difference in the number of teeth? If yes, could you identify which type of teeth showed the difference?
- Compare the number and type of teeth in an adult (say your parents or cousins who have reached the age of 25-30 or more). Note your observation.
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उत्तर
| Type of teeth | Number of teeth | |
| In my mouth | In the figure | |
| Incisors | 8 | 8 |
| Canines | 4 | 4 |
| Premolars | 8 | 8 |
| Molars | 8 | 12 |
- Yes, molar teeth showed the difference in number of teeth.
- A child (of class 7) has 8 incisors, 4 canines, 8 premolars and 8 molars in his mouth whereas an adult who has reached the age of 25-30 has 8 incisors, 4 canines, 8 premolars and last 4 molars are added after the age of 18 years in most human beings.
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संबंधित प्रश्न
List out the food items for healthy mouth and teeth.
Differentiate the following.
Diphyodont and Heterodont
Differentiate the following.
Incisors and Canines
The crown of the tooth is covered by the hardest substance of the body called the ____________.
Match the Column I with Column II and select the correct option.
| Column I | Column II |
| i. Heterodont | a. Teeth embedded in separate sockets in jaw bone |
| ii. Diphyodont | b. Four sets of teeth |
| iii. Thecodont | c. Two sets of teeth in lifetime |
What is milk teeth?
How do you take care of your mouth and teeth?
Teeth are rooted in separate ______ in between the ______.
Label the below given Figure as directed below in (i) to (iv) and give the name of each type of teeth.
- The cutting and biting teeth as ‘A’
- The piercing and tearing teeth as ‘B’
- The grinding and chewing teeth as ‘C’
- The grinding teeth are present only in adults as ‘D’
Write a note on the teeth of humans.
