488 Animal Biology 



The functions of human lymph may be summarized as follows: (1) 

 It bathes all parts of the body not reached directly by the blood, thus 

 supplying foods, oxygen, etc., and receiving carbon dioxide and wastes. 

 There is a continuous interchange between the blood plasma and the 

 lymph through the processes of osmosis and diffusion. (2) It aids in 

 the fight against foreign materials, such as bacteria and protozoa. (3) 

 It helps to equalize body temperature. (4) It helps to regulate the 

 acid-alkaline balance of the various parts of the body. (5) It helps to 



R. INT JUGULAR V. 

 R. SUBCLAVIAN V. 



L. INT. JUGULAR V. 

 THORACIC DUCT 

 . SUBCLAVIAN V. 



INNOMINATE 



SUP. 

 VENA CAVA 



THORACIC OUCT 



RECEPTACULUM 

 CHYLI 



LYMPH NODES 



LACTEALS 



INTE5TINC 



MESENTERY 



Fig. 242. — Lymph svstein and parts of certain veins of the upper part of the 

 body. Lymph from the abdominal organs and lower limbs flows into the tho- 

 racic duct which empties into the left subclavian vein. The lymphatics from the 

 left arm, and the left sides of the thorax, neck, and head also empty into the tho- 

 racic duct. Lymph from the right arm and the right sides of the thorax, neck, 

 and head flows into the right subclavian vein. (From Zoethout and Tuttle: 

 Textbook of Physiology, The C. V. Mosby Go.) 



collect and transport fatigue products which are the result of cellular 

 activity. (6) It probably aids in transporting enzymes and other secre- 

 tions to various body parts (Figs. 240 and 242). 



Human lymph may be found in various places and consequently may 

 have a variety of functions. The principal locations are (1) in the 



