ARRANGEMENT OF THE LARYNX. 



605 



tion bears papillae. Racemose mucous glands are present in groups on the carti- 

 lages of Wrisberg, the cushion of the epiglottis, and in the ventricles of Morgagni; 

 and are scattered in the other situations, especially on the posterior wall of 

 the larynx. The blood-vessels form a dense, capillary network under the limiting 

 layer of the mucous membrane; beneath this are two more layers of vascular net- 

 works. The lymphatics form a superficial, narrower network beneath the blood- 

 capillaries, and a deeper, coarser network. The medullated nerves, which have 



B 



FIG. 211. -.4, Vertical section through the head and neck as far as the first dorsal vertebra: a shows the position 

 of the laryngoscope in order to see the posterior part of the glottis, the arytenoid cartilages, the upper surface 

 of the posterior laryngeal wall, etc.; b shows the position of the laryngoscope in order to obtain a view of the 

 anterior angle of the glottis. B, Large (6) and small (a) laryngeal mirrors. 



ganglia on their branches, are numerous in the mucous membrane; their termina- 

 tions are unknown. The cartilage is hyaline in the thyroid, the cricoid, and 

 almost in the entire arytenoid cartilage, with a tendency to ossification. Fibro- 

 cartilage is found toward the apex and the vocal process of the arytenoid cartilage, 

 and also in all the remaining laryngeal cartilages. 



The larynx grows until about the sixth year, then rests, but rapidly increases 

 in size again at puberty. 



