62 NORMAL HISTOLOGY. 



Fibro cartilage differs from hyaline cartilage in 

 having a distinctly fibrillated intercellular substance. 

 This form of cartilage is found in the intervertebral 

 cartilages, in the meniscuses of certain joints, and at 

 certain points where the ligaments are inserted into 

 the cartilaginous extremities of bones. 



In certain other cartilages such as the epiglottis, 

 some of the small cartilages of the larynx, and the 

 cartilage of the pinna of the ear the intercellular 

 substance contains, in addition to a few fibrillated 

 fibres, elastic tissue, either in the form of fibres or in 

 fine granules. Such cartilage is called fibre-elastic 

 cartilage. In both fibro and fibre-elastic cartilage 

 the cells are identical in character with those of 

 hyaline cartilage. 



Except at the free surfaces, which it presents in 

 the joints, cartilage is surrounded by a layer of 

 fibrillated connective tissue of varying thickness, 

 called the pcricliondrium, in which are found the 

 blood-vessels which supply nutritive material to the 

 non-vascular cartilage within. At the surface of 

 many cartilaginous masses the cells are very much 

 crowded together, and flattened in a plane parallel 

 to the surface. 



TECHNIQUE. 



Hyaline Cartilage from femur of Frog. The head of 

 a femur of a recently killed animal being exposed, a thin 

 slice of cartilage is shaved off with a razor so as to leave 

 a flat surface, from which a thin section should be cut, 



