eyelids, the tongue, the heart, the lungs."

What color are the muscles?--"Red."

How do the muscles move the bones?--"By shortening or lengthening
themselves according to the way the bones are to be moved."

Tell how the muscles move your arm at the elbow.--"The muscles in the front
part of the arm shorten themselves, to draw my fore-arm toward the
shoulder; when I wish to stretch out the fore-arm these muscles lengthen,
while another set of muscles shorten, to draw the fore-arm away from the
upper arm."

What do you say about the muscles because they have the power to shorten
and lengthen themselves?--"They are elastic."

About how many muscles are there in your whole body?--"About four hundred
and fifty."

How may these be divided as you study about them?--"They may be divided
into the muscles of my head, the muscles of my trunk, and the muscles of my
limbs."

Of what use are the muscles of your head?--"They cover and move the parts
of my head and face."

Of what use are the muscles of your trunk?--"They move the parts of my neck
and trunk."

Of what use are the muscles of your limbs?--"They move the parts of my arms