1 66 



AGRICULTURE. 



connected a large number of capillaries. Into these flow the 

 dissolved portion of the blood. After passing through the liver 



system the material is carried 

 in one of the veins to the heart 

 (the right auricle).. 



In Figure 80 we have a con- 

 densed and modified illustration 

 showing how the blood circulates 

 through the body. The arrows 

 show the direction of flow. The 

 black channels are the veins, and 

 the unshaded the arteries (ex- 

 cept Nos. 10 and 12). i is 

 the left side of heart; 2, the right 

 side ; 3, the aorta from the left 

 ventricle ; 4, artery to abdomen ; 

 5, capillaries; 6, vein from ab- 

 domen ; 7, artery to head ; 8, ca- 

 pillaries ; 9, vein from head ; 

 10, artery from right ventricle to 

 lungs; n, the lungs; 12, vein 

 from lungs to left auricle; 13, ar- 

 tery to intestines ; 14, small in- 

 testine; 15, capillaries and veins 

 from intestines carrying away 

 digested food; 16, portal vein; 

 17, artery to liver; 18, liver; 

 19, vein from liver ; 20, lacteals ; 

 21, duct leading to vein going to 

 the heart by which some ab- 

 sorbed material is taken into 

 circulation; 22, artery to the 

 kidneys; 23, the kidneys; 24, vein 



Fig. 80. -The circulation of the f rom t h e kidneys, 

 blood in the body. 



