Chap. VI.] 



CARTILAGE. 



49 



Fig. 31. Fibro-Cartilage of an Interver- 

 tebral Ligament. 



Showing the bundles of fibrous tissue and rows 

 of cartilage cells. (Atlas.) 



again in layers. The ground substance of this carti- 

 lage is said (?) to 

 yield chondrin and : -i m ^ 



not gelatin. Be- 

 tween the strata of 

 the fibrous bundles 

 are rows of more or 

 less flattened oval 

 protoplasmic nu- 

 cleated cells, each 

 invested in a deli- 

 cate capsule(Fig. 31). 

 They are less flat- 

 tened than the cells 

 of tendon, and the 

 capsule distinguishes 

 the two. Where fibro- 

 cartilage passes into 

 tendinous tissue, 



the two kinds of cells pass insensibly into one another. 



61. (3) Yellow, or 

 elastic cartilage. 

 This variety is also called 

 reticular ; it occurs in the 

 epiglottis, in the external 

 ear.intheEustachian tube, 

 in the cartilages of Wris- 

 berg and Santorini in the 

 larynx. In the early 

 stage this kind is hyaline. 

 Gradually numbers of 

 elastic fibrils make their 

 appearance, growing into 

 the cartilage matrix from 

 the perichondrium in a 

 more or less vertical direc- 

 tion, and branching and anastomosing with one 



Fig. 32. From a Section through 

 the Epiglottis. 



, Perichondrium ; 6, networks of 

 elastic fibrils surrounding the carti- 

 lage cells. (Atlas.) 



