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प्रश्न
Name the different types of teeth. What is the function of each type?
उत्तर
There are 4 types of teeth that are found in humans:
- Incisors are the teeth present at the front portion of the mouth. There are four incisors in each jaw. They are used for biting and cutting food.
- Canines are located next to the incisors. There are two canines in each jaw. They are used for tearing and piercing food.
- Premolars lie next to the canines. There are four premolars in each jaw. They are used for chewing and grinding food.
- Molars lie next to the premolars at the end of the jaw. There are six molars in each jaw. They are also used for chewing and grinding food.
संबंधित प्रश्न
Name the types of teeth present in an adult human being. Mention the functions of each.
Number of teeth present in each jaw is ______.
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?
Name the four types of the permanent teeth.
Teeth are rooted in separate ______ in between the ______.
Open your mouth, look into a mirror and try to count the different types of teeth in your mouth. Compare them with Figure 2.3 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.
Write a note on the teeth of humans.
Collect data from your friends, neighbours and classmates to know more about “milk teeth".
Tabulate your data. One way of doing it is given below:
| S.No. | Age at which first tooth fell | Age at which last tooth fel | No. of teeth lost | No. of teeth replaced |
| 1. | ||||
| 2. | ||||
| 3. | ||||
| 4. | ||||
| 5. |
Find out from at least twenty children and find the average age at which children lose the milk teeth. You may take help of your friends.
