238 



THE DOG IN DISEASE. 



minous fluid analogous to the fluid part {plasma) of blood 

 secreted by the capillaries, according to the needs of the 

 tissues in any particular region. This fluid {lymph\ when 



Superior Vena 

 Cava. 



Inferior Vena 

 Cava. 



Capillaries of 

 Liver. 



Portal Vein. 



Capillaries of the 

 Head, etc. 



Pulmonary Ca- 

 pillaries. 



Main Arterial 

 Trunk. 



Capillaries of 

 Splanchnic 

 Area. 



Capillaries of 

 Trunk and 

 Lower Ex- 

 tremities. 



Fig. 14.— Diagram of the Circulation. 

 The arrows indicate the course of the blood. Though the pulmonary, the lower 

 and the upper parts of the systemic circulation are represented so as to show 

 the distinctness of each, it will be also apparent that they are not independent. 

 Relative size of different parts of the system is only very generally indicated. 



it has served its purpose, is in great part removed by 

 another set of vessels, very like blood-vessels, known as 

 lymphatics. It is also likely that not a little is taken up 



