50 



THE CONNECTIVE TISSUES 



[CII. V. 



Hyaline Cartilage is found in the following places : 



1. Covering the articular ends of bones ; here it is called articular 

 cartilage. 



2. Forming the rib -cartilages ; here it is called costal cartilage. 



3. The cartilages of the nose, of the windpipe, of the external 

 auditory meatus, and the greater number of the laryngeal cartilages. 



4. Temporary cartilage: rods of cartilage which prefigure the 

 majority of the bones in process of development. 



Articular cartilage : here the cells are rounded and scattered in 

 groups of two and four through the matrix, which is non-fibrillated 



FIG. 75. Section of transitional cartilage, a, Ordinary cartilage cells ; I o, those with processes. 



(After Schafer.) 



(fig. 74), and much firmer than the ground-substance of the connective 

 tissues proper ; but it is affected in the same way with silver nitrate. 



In the neighbourhood of synovial membranes, the connective- 

 tissue fibres of which extend into the matrix, the cells are branched 

 (transitional cartilage), (fig. 75). 



The next figure (fig. 76) shows the general arrangement of the cell- 

 groups in a vertical section of articular cartilage. Cartilage is free 

 from blood-vessels, and also from nerves. It is nourished by lymph, 

 but canals connecting the cell-spaces are not evident. 



Costal cartilage : here the matrix is not quite so clear, and the cells 



