CELLULAR CARTILAGE. 



55 



joints. It consists of a dense white fibrous matrix in which 

 cartilage-cells are imbedded. According to the character of 

 the cells, it exhibits all gradations to ordinary white fibrous 

 tissue. 



Yellow elastic cartilage (Fig. 24) occurs in the auricles, 

 Eustachian tubes, epiglottis, portions of the arytenoid carti- 

 lages, and the small cartilaginous bodies near the latter. It 



Elastic cartilage, from human auricle (Bohm and Davidoff). 



is characterized by elasticity and resiliency. Its matrix 

 mainly consists of a network of elastic fibres the meshes of 

 which contain the cartilage-cells. 



Cellular cartilage is a primitive form of cartilage, and con- 

 sists of cartilage-cells cemented together in a dense cellular 

 mass with scarcely any intercellular matrix. It occurs in 

 man only at an embryonic period, making up the primitive 

 vertebras; it is found in the ear of mice and some other animals. 



