Object Lessons on the Human Body eBook

This eBook from the Gutenberg Project consists of approximately 74 pages of information about Object Lessons on the Human Body.

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.”

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.”

How can you make your muscles strong?—­“By using them.”

How can you make your muscles weak?—­“By not using them.”

What is necessary to make your muscles strong and healthy?—­“They must be used; they must be rested when tired; they must be supplied with pure blood.”

How should the muscles be used?—­“They should be exercised in work or play.”

How may they be rested?—­“I may rest my muscles by changing position; by changing my kind of work or play; or by going to sleep.”

Explain what you mean by changing your position.—­“If I am standing, I must sit or lie down to rest them; if they are tired, because I have been sitting too long, I must rest them by standing, walking, or running.”

What do you mean by changing the kind of work or play?—­“If, in my work or play, my arms become tired, I must do something in which my arms may rest, though other parts of my body may be in exercise.”

How may you help supply your muscles with good blood?—­“By breathing pure air; by taking wholesome food and drink; and by living in the sunlight.”

How does drinking alcoholic liquors hurt the muscles?—­“It makes them weak, and unfit to move the parts of the body.”

What wonderful muscle moves without your will?—­“The heart.”

How does alcohol hurt the heart?—­“It makes it beat too fast.”

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Project Gutenberg
Object Lessons on the Human Body from Project Gutenberg. Public domain.
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