Describe the tearing teeth.--"The tearing teeth are sharp and pointed."

Describe the grinding teeth.--"The grinding teeth are the thick, back
teeth."

Which jaw is moved in eating?--"The lower jaw."

What work do the teeth perform?--"They cut, tear, and grind the food."

How many teeth has a child in a full set?--"Twenty teeth: ten in each jaw."

How many teeth has a grown person in a full set?--"Thirty-two: sixteen in
each jaw."

What does the tongue do in eating?--"It rolls the food between the teeth,
and helps in swallowing."

What is the saliva?--"A kind of liquid, sometimes called _spit_."

Of what use is it in eating?--"It wets and softens the food."

What do you mean by preserve?--"To keep from injury."

What do you mean by injury?--"Hurt."

How do you preserve your teeth? See Formula.

How do very hot or very cold drinks hurt the teeth?--"They crack the
enamel."