154 



ANATOMY FOR, NURSES. [CHAP. XIII. 



movements of the cilia continually sweep this dirt-laden 

 mucus upwards and outwards. 



The trachea measures about four and a half inches (114 mm.) 



* e s 



FIG. 107. FRONT VIEW OF CARTILAGES OF LARYNX. Trachea and bronchi. 



in length, and three-quarters of an inch (19 mm.) from side to 

 side. It extends down into the thorax from the lower part of 

 the larynx to opposite the third dorsal vertebra, where it divides 

 into two tubes, the two bronchi, one for each lung. 



