Object Lessons on the Human Body - A Transcript of Lessons Given in the Primary Department of School No. 49, New York City by Sarah F. Buckelew;Margaret W. Lewis
page 44 of 131 (33%)
page 44 of 131 (33%)
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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 |
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