110 



STUDENTS HISTOLOGY 



7. Elastic fibers of the more solid parts of the tendon. 



8. Lymph-capillaries. (These will be seen in the partitions 

 between the larger paths. In places they may be observed empty- 

 ing into the paths, and again will appear as simple cavities, ac- 

 cording to the manner sectioned.) 



9. The deeper capillaries. (Careful focusing upon the por- 

 tions of the tendon which appear most solid will reveal minute 

 cell -lined channels or capillaries. The student must remember 



FIG 76. 



LYMPH-CHANNELS. CENTRAL TENDON OF DIAPHRAGM OF RABBIT. 

 SILVER -STAINING (X 60). 



The dark portions represent the more solid portions of the tissue. 



The light areas are the lymph-channels ; the direction of the flow is shown hy the arrows. 

 The minute lines in the lymph-spaces are the silver-stained cement boundaries of the 

 endothelial cells lining the channels. 



The valves appear as curved lines in the lymph-spaces. 



that we cannot penetrate tissues with the microscope to any con- 

 siderable depth, but are restricted to nearly a single plane. If it 

 were possible to penetrate with the eye the entire thickness of the 

 tendon, we might trace the lymph -paths or channels from the 

 abdominal to the thoracic surface.) 



