52 



HUMAN PHYSIOLOGY 



to act, the excess of sugar in the blood is likely to 

 attain great dimensions and thus to constitute a very 

 serious phase in the history of cases of diabetes. 



ABSORPTION. We have now arrived at the close 

 of the digestive journey. Reviewing the stages 

 through which the food has already passed, we have 

 noted that a considerable amount of the nutriment 



12. SECTION OF BODY 



Showing (a) windpipe; (6) junction of thoracic 



duct; (c) junction of right duct with vein in 



neck ; (d) aorta, or main descending artery ; 



(e e) lungs ; (/) diaphragm ; (g) kidney. 



has already been conveyed into the blood. Thus 

 peptones early left the stomach and reached the 

 blood through the liver, supplying nitrogenous foods 

 to the circulation and thus placing them quickly at 

 the service of the body. Sugar from the intestine, 

 we saw, passes up the portal vein and is dealt with 



