68 STUDENTS HISTOLOGY 



is termed articular cartilage. It is also found in the trachea, the 

 bronchi, the septum narium, etc. 



Fig. 42 shows a section of hyaline cartilage from one of the 

 rings of a large bronchus. 



FIBRO - CARTILAGE 



Fibrous connective tissue, predominating largely in the basis 

 substance, produces a structure of great strength fibro- cartilage. 

 The intervertebral disks afford an example of this variety, from a 



FlG. 43. FlBRO-CARTILAGE FROM AN INTERVERTEBRAL PLATE OR DlSK. 



The ground-substance, unlike that of the hyaline varisty, consists of dense fibrous tissue 

 with little calcareous matter (X400). 



section of which Fig. 43 has been drawn. The fibrous tissue is a 

 very prominent feature of the ground substance. 



ELASTIC OR RETICULAR CARTILAGE 



As the name implies, yellow elastic tissue is an important ele- 

 ment of the ground - substance of elastic cartilage. It presents 

 the form of a reticulum, as shown in Fig. 44. It is not exten- 

 sively distributed in the human being, although the cartilages of 

 the external ear, Eustachian tube, epiglottis, etc., are of this 

 variety. 



Cartilage should be hardened by the chromic acid and alcohol 

 process. ' The sections from which the illustrations have been 

 drawn were cut without the microtome. They should be cut 



