Of what use are the nostrils?--"To let the air into and out of the opening
back of the mouth."

* * * * *

QUESTIONS ON THE MOUTH, ETC.

Where is the mouth?--"In the lower part of the face, between the nose and
the chin."

Of what use is the mouth?--"To breathe, speak, and eat through."

What is in the mouth?--"My tongue, my upper teeth, my lower teeth, and my
upper and lower jaws."

What covers the jaws?--"Red flesh, called _gum_."

Of what are the jaws composed?--"Of bones."

Of what are the teeth made?--"Of dentine, covered with enamel." See note,
p. 19.

What is enamel?--"A smooth, white substance, harder than bone."

Of what use are the teeth?--"To eat and talk with."

What kinds of teeth have you?--"Cutting teeth, tearing teeth, grinding
teeth."

Describe the cutting teeth.--"The cutting teeth have broad and flat edges."