my lower teeth,
my upper teeth,
my lower teeth,
and my upper and lower jaws, covered with flesh called _gum_.

5. _The Teeth._--My teeth are used in eating and talking.

My teeth are made of a soft kind of bone, covered with enamel.

I have three kinds of teeth: cutting teeth, tearing teeth, grinding teeth.

A young child has twenty teeth, ten in each jaw.

A grown person has thirty-two teeth, sixteen in each jaw.

6. To preserve my teeth:

I must keep them clean.
I must not scratch the enamel.
I must not eat or drink anything very hot or very cold.
I must not use them for scissors or nut-crackers.
I must not burn them with tobacco or cigars.

7. _About Eating._--When I eat I move my lower jaw only.

My tongue brings the food between my teeth,
the cutters cut it,
the tearers tear it,
the grinders grind it,
the saliva moistens it,