BLOOD 



453 



found on p. 524. The pressure in the blood, caused by the 

 heartbeat, forces water and crystalloid solutes out of the capil- 

 laries, where they are joined by white cells which force their 



FIG. 358. — Main lymph vessels, and branches 

 of the superior vena cava of man 

 (diagrammatic) . 



I, Right subclavian lymph-trunk ; 2, right subclavian 

 vein ; 3, right jugular lymph-trunk ; 4, right internal 

 jugular vein ; 5, broncho-mediastinal (lymph) duct ; 

 6, left internal jugular vein ; 7, left jugular lymph- 

 trunk; 8, thoracic duct; 9, left subclavian lymph- 

 trunk ; 10, left subclavian vein ; 11, left innominate 

 vein; 12, thoracic duct; 13, superior vena cava; 

 14, thoracic duct ; 15, cistema chyli ; 16, left 

 lumbar lymph-trunk ; 17, right lumbar lymph- 

 trunk ; 18, intestinal lymph-vessels ; 19, testicular 

 lymph-vessels ; 20, lymph-vessels from pelvis ; 

 21, lymph-vessels from leg. 



way through cracks between the cells of the walls. The resulting 

 blood minus red cells and proteins is called lymph, and it is this 

 which carries food and oxygen to the living cells of the body. 

 Some of the lymph is sucked back into the venous capillaries 

 by osmosis, because the blood pressure is here lower than the 



