Question

Write a short note on arrangement of teeth. THIS A QUESTION OF CLASS 7 SCIENCE NCERT CHAPTER 2

Answer 1

Answer:

Teeth help in chewing our food.

Each tooth is placed in separate sockets in the gums.

There are different types of teeth which perform different functions.

There are two sets of teeth, one set is called milk teeth which grow during infancy and they fall between age of six to eight years.

Second set of teeth is called permanent teeth which replace milk teeth and they remain throughout our life. They fall during old age.

 

Explanation:

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Answer 2

Answer :- These arrangements of teeth are expressed through a special formula called the dental formula, which is expressed in the form of fractions. ... Overall adults have 32 teeth in total, called permanent or secondary teeth, and it includes: Eight incisors – Four incisors in the upper jaw and four incisors in the lower jaw.