200 CARTILAGINOUS SYSTEM. 



Q. What change is manifested in the cartilages at ad- 

 vanced periods of life? 



Ji. They become ossified in many cases. 



Q. What does the early tendency of the cartilages of 

 the cavities to ossification often induce? 



ft. More frequent caries of these than of other carti- 

 lages. 



Q. What laryngeal cartilages are most disposed to 

 ossify? 



*#. The arytenoid; in every case of laryngeal phthisis 

 this has appeared on dissection. 



Q. What different causes give rise to osseous and carti- 

 laginous depositions, where these should not be? 



ft. Age produces the bony deposition; disease gives rise 

 to the cartilaginous formations. 



Q. Where is preternatural cartilage most frequently 

 found? 



#. In the spleen and in the lungs. 



Q. What is the composition of the cartilages? 



#. Varying in the constituent proportions at different 

 periods of life, they are composed of albumen, mucus, 

 oil, acetic acid, water, phosphate of lime, and other salts. 



Q. What is the morbid anatomy of the cartilages? 



#. Swelling and softness in white swelling; they are 

 sometimes absorbed or converted to bone; they ulcerate. 

 When broken they reunite by means of bony bands and 

 bonds. 



