3. _The Nose._--My nose is to smell and breathe with; it is in the middle
of my face:
my two nostrils,
the bridge of my nose,
the cartilage,
the tip of my nose.
My nostrils lead to a passage back of my mouth through which I breathe.
The cartilage separates my nose into two parts.
4. _The Mouth._--My mouth is to speak, eat, and breathe through:
my upper lip,
my lower lip.
In my mouth are:
my tongue,
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,
and my tongue helps me to swallow it.
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