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प्रश्न
Differentiate the following.
Diphyodont and Heterodont
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उत्तर
| Diphyodont | Heterodont |
| In human beings two sets of teeth (Diphyodont) are developed in their life time. | Permanent teeth are of four types (Heterodont). |
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संबंधित प्रश्न
Name the different types of teeth.
Say true or false.
Brush your teeth once a day.
Every day we should brush our teeth _______ times.
Tick (✓) the foods that are good for your teeth and cross (x) the food that is bad for your teeth.
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Name the types of teeth present in an adult human being. Mention the functions of each.
Number of teeth present in each jaw is ______.
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 |
How do you take care of your mouth and teeth?
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’
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.
