Teeth and Microbes

We will discuss about teeth and microbes.

A snake can swallow whole egg!

We need to chew the food before swallowing it. We can ask our parents, to know when we got the first tooth. It must have been when we were 6 or 7 months old.

When a child he or she is at the age of 3 years old should have 20 teeth. This first set of teeth is called milk teeth. When the child is about 6 years old, the milk teeth begin to fall off. New teeth start appearing in their place. These are called permanent teeth.

By the times the child grows to be 21 years old, he or she has 32 permanent teeth.

Fourth Grade

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