Identifier: anatomyphysiolog00mayc (find matches)
Title: Anatomy, physiology and hygiene
Year: 1890 (1890s)
Authors: May, Charles Henry, 1861-1943
Subjects: Human anatomy Physiology Hygiene, Popular. (from old catalog)
Publisher: New York, W. Wood and company
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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ion. 270. Protecting the Windpipe.—The vocal cords arefound at the upper part of the larynx ; when they come to-gether tightly, they close the larynx completely, so that noth-ing can pass into it. This is what they do whenever any foodor solid body tries to get into the larynx or windpipe. Itwill be seen how necessary this is; otherwise we would alwaysbe in danger of being choked. Sometimes the food is swal-lowed unexpectedly, and the vocal cords forget to close ; thenwe say the food has gone down the wrong way. This is verydistressing, causing coughing until the piece of food is dis-lodged. In speaking or laughing during meals care shouldbe taken that the mouth is not full, otherwise this accidentmay happen. THE ORGANS OF VOICE AND BREATHING. 133 271. The Vocal Cords in Breathing.—When we breathein or inspire, the vocal cords separate widely, so as to let theair pass readily into the windpipe and into our lungs (Fig. 64).When the air passes out (expiration), the vocal cords again
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Figs. 64, 65, and 66.—Showing the Position of the Vocal Cords in Breathing and in Usingthe Voice. In Pig. 64 the cords are widely separated, as they are in inspiration : in Fig.65 the cords are slightly separated, as they are in expiration ; in Fig. 66 the cords arebrought together closely, as they are when sounds are produced. come together, but not tightly, there being still some space leftbetween the two (Fig. 65). 272. How Sounds are Produced.—Previous to makinga sound we always take a deep breath. Then this air is blownout again ; as it passes through the larynx, between the vocalcords, it makes these vibrate, and through the rapid motion of 134 ANATOMY, PHYSIOLOGY, AND HYGIENE. the vocal cords, sound is produced. There are many differ-ences in the quality of the human voice, being coarse in some,sweet in others, high in some, low in others. Then there areother peculiarities of the voice, so that we can distinguish ourfriends by hearing them speak. 273. It depends very much u

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