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QUESTIONS ON THE MUSCLES.
What are the muscles?--"The lean flesh of the body; bands and bundles of
fleshy threads which cover the body."
Of what use are the muscles to the body?--"They cover the bones; they
support and move the bones and different parts of the body."
Name some parts of the body which are made of muscles.--"The eyeballs, the
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.
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