IX.] 



THE FIBRO-CARTILAGES. 



155 



Between the cells is a matrix, which may be partly hyaline and 

 partly yellow fibrous. 



8. Transition of Hyaline to Elastic Cartilage (H). Dissect 

 out the arytenoid cartilage of an ox or sheep. Harden and pre- 

 serve it in alcohol. Cut sections through the part where the 

 hyaline cartilage merges into the elastic variety. This is quite 

 visible to the naked eye, the elastic part being more opaque and 

 yellowish white in tint. Stain a section with picro-carmine, and 





. 1 18. Elastic Cartilage Ear of Horse, 

 hardened in alcohol. El. Elastic fibres cut 

 in various directions ; K. Nucleus of 

 cartilage-cell ; Knh. Contour of cartilage-cell 

 cavity ; Knh'. Empty cartilage capsule ; Knz. 

 Cartilage-cell. 



FIG. ng. Elastic Cartilage developing in 

 Hyaline Cartilage in Arytenoid Carti- 

 lage of a Calf, x ioo. The clear spaces 

 indicate the position of the cells, the 

 shadow part the hyaliue matrix. 



mount it in Farraiit's solution. On making a section of such a 

 cartilage in the fresh condition, one part has the pale-bluish colour 

 of hyaline cartilage, and the other part is very faintly yellow. 



(a.) At one part observe hyaline cartilage, whose matrix 

 gradually becomes fibrous. At first only a few scattered granules 

 of elastin are seen, then the hyaline matrix is traversed by elastic 

 fibres, and gradually the matrix loses its hyaline character, and 

 becomes distinctly fibrous. Around each cell there is a clear area 

 hyaline devoid of fibres (fig. 119). 



