io6 



THE TISSUES. 



The structure of an aponeurosis and a ligament is like that of a 

 tendon. 



The structure of a fascia, the dura mater, and the more fully 



>c 



Tendon cell. 



Tendon fibers. 



Tendon 

 cell. 



Tendon 

 fasciculus. 



Fig. 7 1 - Longitudinal section of tendon ; Fig. 72 Cross-section of secondary 

 X 270. tendon bundle from tail of a rat. 



developed gland capsules, differs from that of the formed connective 

 tissues above described, in that the fasciculi are not so regularly 

 arranged, but branch and anastomose and intercross in several 

 planes. 



(c) Elastic Fibrous Tissue. In certain connective tissues the 

 elastic fibers predominate greatly over the fibers of white fibrous 

 connective tissue. These are spoken of as elastic fibrous tissues and 

 their structural peculiarities warrant the making of a special sub- 

 group. 



The ligamentum nuchae of the ox consists almost exclu- 

 sively of elastic fibers, many of which attain a size of about io//. 

 The elastic fibers branch and anastomose, retaining, however, a 



o " 



generally parallel course. They are separated by a small amount of 

 areolar connective tissue, in which a connective-tissue cell is here 

 and there found, and are grouped into bundles surrounded by thin 

 layers of areolar connective tissue ; the whole ligament receives an 

 investment of this tissue. In cross-sections of the ligamentum 

 nuchae, the larger elastic fibers have an angular outline ; the smaller 

 ones are more regularly round or oval. (Fig. 74.) In man the 

 ligamenta subflava, between the laminae of adjacent vertebrae, are 

 elastic ligaments. 



In certain structures (arteries and veins), the elastic tissue is 

 arranged in the form of membranes. It is generally stated that 



