XXI. 



THE LARYNX AND THE VOICE. 

 A. The Larynx. 



Material. The larynx of a calf or a sheep. If possible, obtain 

 a specimen of the larynx with the tongue and surrounding organs 

 still attached. 



I. THE DIFFERENT ORGANS OF THE SPECIMEN. 

 Identify : 



a. The trachea, or windpipe. 



b. The larynx, or cartilaginous box, at the upper end of 

 the trachea. 



c. The oesophagus, or gullet, a muscular walled tube run- 

 ning parallel with the trachea. Notice how it is attached 

 to the larynx. 



d. The tongue. How is it held in place ? 



e. The hyoid bones, at the root of the tongue, holding it 

 in position. Where are they attached ? 



/. Some glands may be present in your specimen. 

 g. Sketch. 



II. THE TRACHEA. 



Review the structure of the trachea. 



III. THE LARYNX. 



Remove the fat, the blood-vessels, the lower part of the 



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