102 



HUMAN PHYSIOLOGY 



CHAP. 



destroy harmful substances made in the various cells of 

 the body. So we see that the liver is a very important 

 organ, for it does many things to keep the blood pure 

 and to keep the right amount of the different foods in 

 the blood. 



/ 



SHv 



FlG. 56. Showing two lobules of the liver. (Modified from Schafer by 

 Zinns) : /, portal vein bringing blood to the lobules; HV, beginning of he- 

 patic vein formed by the union of the capillaries within the lobule; SHV, 

 hepatic vein carrying blood away from the lobules. 



The sugars stored up in the liver pass into the blood 

 whenever the body needs them, and they reach the 

 heart through a large blood vessel called the ascending 

 vena cava. 



81. Foods in the Right Heart. The fats are ab- 

 sorbed by way of the lacteals and lymphatics, or by 

 the indirect method, and all the other foods by way of 

 the blood capillaries and' the liver, or by the direct 

 method. The two again unite in the blood in the right 

 side of the heart. The bread, meat, potatoes, etc., that 

 we eat are changed in digestion, so that they get into 



