LYMPH FLOW 



53 



If we assume that B in figure 24 represents the- lumina of 

 the blood capillaries containing blood plasma ; A, the inter- 

 stitial spaces, containing lymph which has diffused through the 

 walls of the blood capillaries (D) ; E, the walls of the blindly- 

 ending lymphatics, and C, the lumina of the lymphatic ves- 

 sels, containing lymph which has diffused through the endo- 

 thelial walls of the lymphatics (E) from the interstitial 

 spaces (A), we can picture how, under slightly varying con- 



P. Glass tube opening inti 

 Small qlove C 



Level of fluid in container 



- B. Flyid in container 

 (lumma of to/ood caps.) 



-O.fwn of lanjestae 

 (Endothelial i^ali of blood, caps) 



/A. FluU in large glove 



*' L in intfrstitial spaces) 



- E. SKIM of jmdilQtove 

 (Efldothelial wall of lymphatics) 



C. Fluid m small jjlowe 

 Lumina of lymphatics) 



ditions of the electrolytes and of the concentration of the 

 body fluids, a continuous flow of fluid might be established 

 between the blood capillaries and the lymphatics. Also, as in 

 the case of the frog's skin, it is quite possible that the normal 

 physiological direction in which fluids are transported 

 through the endothelial walls may depend upon which surface 

 of the capillary wall is directed outward or inward, so that, 

 if we could experimentally turn the inner surface of the 

 lymphatic capillaries outward, lymph might then diffuse into 

 the tissue spaces from the lymphatics. 



We may therefore assume the possibility that the flow of 

 fluid between the blood capillaries and the lymphatics may !>< 



