CENTRAL TENDON OF THE DIAPHRAGM. 165 



Note the change in form of the cells approaching and covering the 

 valves.) 



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



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

 tween the larger paths. In places they may be observed emptying 

 into the paths, and again will appear as simple cavities, according to 

 the manner sectioned.) 



9. The deeper capillaries. (Careful focussing the portions of 



FIG. 110. LYMPH-CHANNELS. CENTRAL TENDON OP DIAPHRAGM OF RABBIT. SILVER STAINING. 



K60. 



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



The light areas are the lymph -channels; and the direction of the flow is shown by the 

 Arrows. 



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

 pavement cells lining the channels. 



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



the tendon which appear most solid will reveal minute cell-lined 

 channels or capillaries. The student must remember that we cannot 

 penetrate tissues with the microscope to any considerable depth, but 

 are restricted to nearly a single plane. If it were posssble to penetrate 



