CHAPTER XXXVI 

 THE VOICE 



627. The larynx. The basis of the voice is a sound 

 made in the larynx during expiration. The larynx is a 

 triangular box about three quarters 

 of an inch across, made of cartilages. 

 It connects the trachea and pharynx. 

 Its two sides are formed of a flat 

 cartilage, bent sharply backward, 

 and called the thyroid cartilage. 

 The upper end of the fold projects 

 slightly from under the chin and is 

 called the Adams apple. Under- 

 neath the thyroid cartilage is a cir- 



J i_ i Back view * the terynx. 



cular cartilage whose back part pro- 



a thyroid cartilage. 



jects upward so as partly to fill in b vocal cords. 



space between the back edges of c movable cartilage for the 



attachment of the vocal 



the thyroid cartilage. In form and cords. 

 size it resembles a large finger ring, d cricoid cartilage. 



' e epiglottis. 



and is called the cricoid cartilage. 



On top of the back part of the cricoid cartilage are two 

 small cartilages, shaped like triangular pyramids, and so 

 arranged that they can turn sidewise. One lower corner 

 of each projects forward. From it a flat band extends 

 across the larynx, and, with its fellow from the opposite 

 side, attaches itself to the lower part of the thyroid carti- 

 lage. Muscles can tighten them and bring them close 



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