4O CELL DIFFERENTIATION AND THE ELEMENTARY TISSUES 



Cartilage exists in three different forms in the human body, viz., hyaline 

 cartilage, yellow elastic cartilage, and white fibro- cartilage. 



Hyaline Cartilage. This variety of cartilage is met with largely in 

 the human body where it invests the articular ends of bones, and forms the 

 costal cartilages, the nasal cartilages, and those of the larynx with the ex- 



FIG. 48. Fresh Cartilage from the Triton. (A. Rollett.) 



ception of the epiglottis and cornicula laryngis, the cartilages of the trachea 

 and bronchi. 



Structure. Like other cartilages, it is composed of cells embedded in a 

 matrix. The cells are irregular in shape, generally grouped together in 



FIG. 49. Costal Cartilage from an Adult Dog, showing the Fat Globules in the Cartilage 



Cells. (Cadiat.) 



patches, figure 47. The patches are of various shapes and sizes and placed 

 at unequal distances apart. They generally appear flattened near the free 

 surface of the mass of cartilage, and more or less perpendicular to the surface 

 in the more deeply seated portions. 



