120 



LECTURE V. 



over a tendon which is of importance in more than one 

 way in an operative point of view, I may, I am sure, be 

 excused for speaking a little more at length concern- 

 ing it. 



On the surface of a tendon we see, as you well know, 

 with the naked eye, a series of parallel, whitish striae 

 which run pretty close to one another in a longitudinal 

 direction, and give rise to the characteristic glossy ap- 

 pearance. In a microscopical longitudinal section these 

 striae lie farther apart, so that the tendon presents a 



FIG. 37. 



somewhat fasciculated appearance and looks less homo- 

 geneous than on the surface. This becomes much more 

 evident in a transverse section, in which a series of 



Fig. 37. Transverse section from the tendo Achillis of an adult. From the sheath 

 of the tendon, septa are seen at a, 6, and c, running inwardly, and uniting into a 

 network so as to form the boundaries of the primary and secondary fasciculi. The 

 larger ones (a and 6) generally contain vessels, the smaller ones (c) do not. Within 

 the secondary fasciculi is seen the delicate network formed by the tendon-corpus- 

 cles (reticulating cells Netzzellen), or the intermediate system of juice-conveying 

 canals (Saftkanalsystem). 80 diameters. 



