THE WHITE FIBROUS TISSUE 



Adenoid or retiform. 

 Adipose. 

 Neuroglia. 

 Cartilage. 



1. Hyaline. 



2. White fibrous. 



3. Elastic. 

 Bone and dentine. 



The White Fibrous Tissue. It is found typically in tendon; also 

 in ligaments, in the periosteum and perichondrium, the dura mater, the peri- 

 cardium, the sclerotic coat of the eye, the fibrous sheath of the testicle, in the 

 fasciae and aponeuroses of muscles, and in the sheaths of lymphatic glands. 



Structure. To the naked eye, tendons and many of the fibrous membranes, 

 when in a fresh state, present an appearance as of watered silk. This is due 





FIG. 38. 



FIG. 38. Mature White Fibrous Tissue of Tendon, Consisting Mainly of Fibers with a Few 

 Scattered Fusiform Cells. (Strieker.) 



FIG. 39. Caudal Tendon of Young Rat, Showing the Arrangement, Form, and Structure of the 

 Tendon Cells. X 300. (Klein.) 



to the arrangement of the fibers in wavy parallel bundles. Under the micro- 

 scope the tissue appears to consist of long, often parallel, bundles of fibers of 

 different sizes. The cells in tendons, figure 39, are arranged in long chains in 

 the ground substance separating the bundles of fibers, and are more or less regu- 

 larly quadrilateral with large round nuclei containing nucleoli, generally 

 placed so as to be contiguous in two cells. Each of these cells consists of a 

 thick body from which processes pass in various directions into, and partially 

 fill up the spaces between, the bundles of fibers. The rows of cells are sep- 

 arated from one another by lines of cement-substance. 



Yellow Elastic Tissue. Yellow elastic tissue is found chiefly in 

 the ligamentum nuchae of the ox, horse, and other animals; the ligamenta 

 subflava of man; the arteries, constituting the fenestrated coat of Henle; 

 3 



