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 and legs."