CIRCULATION 



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Fig. 48.— Diagram of the circulation of the arterial and venous blood and the lymph. 

 A.I., Arteries to head, arm and neck; V.pul., Pulmonary vein; Z.^itt., Left 

 auricle ; Ao., Aorta ; L.v., Left ventricle ; A. 2., Arteries to lower part of body; 

 St., Stomach and intestine; Cap., Capillaries; L.d., Lymph duct; L., Lunes ; 

 7.1., Veins from head, arms and neck ; v.c.Svp., Vena cava sup.; A .pul., Pul- 

 monary artery; R.au., Right auricle; R.v., Right ventricle ; Th.d., Thoracic 

 duct ; v.c.Inf., Vena cava inf. (from lower part of body); Lac, Lactcals ; Liv., 

 Liver; Ld., Lymph duct; 7.2., Vein from intestine to liver (Portal vein); ^4.3., 

 Artery to liver ; T.c, Tissue cells. (From Fitz.) 



recoil of their elastic walls makes them press upon the 

 blood and squeeze it forward. But before they have 



